Marine BiologyApril 3rd, 2026
Coral Reef Reptiles-Part 2
I am a great subtitle, ideal for providing morecontext about the topic you are going to address
Agenda 4/3/2026
9. Homework
1. Check in
10.Check-Out
2. Review Coral Reef Day 7 Homework
11. Audio
3. Review Quiz
12. Embedded Content
4. Coral Reptiles Cont.
13. Interactive Question
5. Coral Reptiles-Turtles
14. Conclusions
6. Coral Reptiles-Sea Snakes
16. Closing
7.Coral Reptiles-Marine Iguanas
8. Coral Reptiles-Saltwater Crocodiles
Check in-Go to Nearpod
Sections like this will help you organize
Agenda 4/3/2026
9. Homework
1. Check in
10.Check-Out
2. Review Coral Reef Day 7 Homework
11. Audio
3. Review Quiz
12. Embedded Content
4. Coral Reptiles Cont.
13. Interactive Question
5. Coral Reptiles-Turtles
14. Conclusions
6. Coral Reptiles-Sea Snakes
16. Closing
7.Coral Reptiles-Marine Iguanas
8. Coral Reptiles-Saltwater Crocodiles
day 7homework
These are all correct. I want to make it easier for you to write it. Would you rather have a page with lines to write or a Word copy to type in?
Agenda 4/3/2026
9. Homework
1. Check in
10.Check-Out
2. Review Coral Reef Day 7 Homework
11. Audio
3. Review Quiz
12. Embedded Content
4. Coral Reptiles Cont.
13. Interactive Question
5. Coral Reptiles-Turtles
14. Conclusions
6. Coral Reptiles-Sea Snakes
16. Closing
7.Coral Reptiles-Marine Iguanas
8. Coral Reptiles-Saltwater Crocodiles
Review Quiz-question 1
Review Quiz-question 2
Review Quiz-question 4
Review Quiz-question 5
Review Quiz-question 6
Review Quiz-question 7
Review Quiz-question 8
Review Quiz-question 9
Review Quiz-question 10
Review Quiz-question 11
Review Quiz-question 12
Review Quiz-question 13
Agenda 4/3/2026
9. Homework
1. Check in
10.Check-Out
2. Review Coral Reef Day 7 Homework
11. Audio
3. Review Quiz
12. Embedded Content
4. Coral Reptiles Cont.
13. Interactive Question
5. Coral Reptiles-Turtles
14. Conclusions
6. Coral Reptiles-Sea Snakes
16. Closing
7.Coral Reptiles-Marine Iguanas
8. Coral Reptiles-Saltwater Crocodiles
Coral Reptiles-Turtles
Do you remember what kind of turtle this was? That we talked about last time?
Hawksbill turtle
Eretmochelys imbricata
Hawksbill Nesting Sites
What do they eat? (Click the E)
What is their Habitat? (Click the H)
What do they look like? (Click the eye)
Why are they endangered?(Click the heart)
Agenda 4/3/2026
9. Homework
1. Check in
10.Check-Out
2. Review Coral Reef Day 7 Homework
11. Audio
3. Review Quiz
12. Embedded Content
4. Coral Reptiles Cont.
13. Interactive Question
5. Coral Reptiles-Turtles
14. Conclusions
6. Coral Reptiles-Sea Snakes
16. Closing
7.Coral Reptiles-Marine Iguanas
8. Coral Reptiles-Saltwater Crocodiles
Coral Reptiles-Sea snakes
Sea Snakes vs. Kraits
Sea Kraits
True Sea Snakes
NOT TRUE SEA SNAKES!
Spend Entire Lives at Sea!
+ info
+ info
- Give birth to live young in the water
- Examples:
1. Olive Sea Snake 2. Yellow-bellied Sea Snake
- Semi-Aquatic
- Hunt eels among Coral
- Must return to land to digest their food and lay eggs
Basic Sea Snake Anatomy
10 Fascinating Sea Snake facts
Map
Video quiz-Go to nearpod
I'm ready!
instructions
Go to Marine Iguanas
Agenda 4/3/2026
9. Homework
1. Check in
10.Check-Out
2. Review Coral Reef Day 7 Homework
11. Audio
3. Review Quiz
12. Embedded Content
4. Coral Reptiles Cont.
13. Interactive Question
5. Coral Reptiles-Turtles
14. Conclusions
6. Coral Reptiles-Sea Snakes
16. Closing
7.Coral Reptiles-Marine Iguanas
8. Coral Reptiles-Saltwater Crocodiles
Coral Reptiles-Marine iguana
Marine Iguana (Amblyrhynchus cristatus)
Only lizards that dive to feed.
- Endemic to the Galápagos Islands
- Life Span: 5 to 12 years
- Size: .6 to 1.5m
- Weight: .5 to 12 kg
- Can dive up to 30 m
- Hold breath up to 45 min.
- Females can lay up to 6 eggs
Use the reef to forage for underwater algae growing on rocks.
The Galapagos Islands are located in the eastern Pacific Ocean, located roughly 600 miles (1,000 km) west of Ecuador in South America.
Marine Iguanas ONLY live in the Galapagos Islands and have developed unique adaptations for this environment.
Salt Glands
Staying underwater
The Marine Iguana slows its body systems so it can stay underwater longer without having to come up for air. Afer an hour passes, its belly is full and it heads back to the rocks again to digest its meal.
Creates space for other marine species, contributing to the overall biodiversity of the archipelago's marine communities.
Algae Regulation: Prevents overgrowth and suffocation of other reef organisms.
Ecosystem Health Indicator: Highly sensitive to changes in their environment—such as temperature spikes during El Niño events that reduce algae supplies—their population health and survival rates serve as a crucial indicator for the overall health of the Galápagos marine ecosystem. Maintain health and balance of shallow reefs and rocky coastlines of the Galápagos Islands.
The male Marine Iguanas fiercely butt heads to determine superiority – sometimes getting rather violent.
During the Marine Iguana breeding season, the males develop reddish patches which vary from island to island, giving them the nickname "Christmas Iguanas". Mating Season is December to March, but varies from island to island.
On one particular island – Hood Island – the male will turn almost completely red.
Agenda 4/3/2026
9. Homework
1. Check in
10.Check-Out
2. Review Coral Reef Day 7 Homework
11. Audio
3. Review Quiz
12. Embedded Content
4. Coral Reptiles Cont.
13. Interactive Question
5. Coral Reptiles-Turtles
14. Conclusions
6. Coral Reptiles-Sea Snakes
16. Closing
7.Coral Reptiles-Marine Iguanas
8. Coral Reptiles-Saltwater Crocodiles
Coral Reptiles-Saltwater crocodiles (Crocodylus porosus)
Typically associated with estuaries and mangroves, these massive predators are known to venture into the open ocean and inhabit the waters around coral reefs, such as the Great Barrier Reef, to hunt.
Crocodile senses
What is their Habitat? (Click the H)
Reveal
What do they eat? (Click the E)
Crocodile Behavior (Click the black croc)
What do they look like? (Click the eye)
Generally avoid clear reef waters because they are ambush hunters that rely on camouflage. Pristine water makes them too exposed to effectively hunt reef fish.
Crocs in Reefs
It is rare to encounter saltwater crocodiles (estuarine crocodiles) on the outer Great Barrier Reef, they are an apex predator within the reef ecosystem, particularly around inshore fringing reefs and estuaries
+ info
Croc in Reef
Agenda 4/3/2026
9. Homework
1. Check in
10.Check-Out
2. Review Coral Reef Day 7 Homework
3. Review Quiz
4. Coral Reptiles Cont.
5. Coral Reptiles-Turtles
6. Coral Reptiles-Sea Snakes
7.Coral Reptiles-Marine Iguanas
8. Coral Reptiles-Saltwater Crocodiles
check out Question 1
check out Question 2
Agenda 4/3/2026
9. Homework
1. Check in
10.Check-Out
2. Review Coral Reef Day 7 Homework
3. Review Quiz
4. Coral Reptiles Cont.
5. Coral Reptiles-Turtles
6. Coral Reptiles-Sea Snakes
7.Coral Reptiles-Marine Iguanas
8. Coral Reptiles-Saltwater Crocodiles
Homework
Swimming for dinner
A Powerful Swimmer, the marine iguana, sweeps its tail from side to side as it searches for more seaweed.
Habitat: Lagoons, rocky coasts, coral reefs of estuaries of over 108 Countries.
where do crocs hang out?
Prefer Murky, dark, and still waters like mangroves, river mouths, and tidal flats. Strong swimmers and highly salt-tolerant. Can travel hundreds of kilometers across the open ocean, occasionally appearing on remote islands or outer reef sites while "on the move".
Salt glands are specialized organs in marine birds, reptiles, and some plants that excrete excess salt. Lacking Kleenex technology, marine iguanas often get hit with their own snot rockets. You’ll often see a white crust of salt on their heads and snouts.
Osteoderms: bony deposits—essentially "skin bones"—forming plates or nodules within the dermis of many reptiles.
Charles Darwin visited the Galápagos Islands in 1835 aboard the HMS Beagle, making crucial observations of unique species—such as finches, tortoises, and iguanas—that were adapted to specific, isolated environments. These findings directly influenced his groundbreaking theory of evolution by natural selection, detailed in On the Origin of Species.
Eating
The Marine Iguana wets its appetite on the shoreline seaweed/algae, but soon absorbs so much heat it has to dive into the depth to cool its body and eat its main course.
Coral Reef Reptiles-Part 2
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Transcript
Marine BiologyApril 3rd, 2026
Coral Reef Reptiles-Part 2
I am a great subtitle, ideal for providing morecontext about the topic you are going to address
Agenda 4/3/2026
9. Homework
1. Check in
10.Check-Out
2. Review Coral Reef Day 7 Homework
11. Audio
3. Review Quiz
12. Embedded Content
4. Coral Reptiles Cont.
13. Interactive Question
5. Coral Reptiles-Turtles
14. Conclusions
6. Coral Reptiles-Sea Snakes
16. Closing
7.Coral Reptiles-Marine Iguanas
8. Coral Reptiles-Saltwater Crocodiles
Check in-Go to Nearpod
Sections like this will help you organize
Agenda 4/3/2026
9. Homework
1. Check in
10.Check-Out
2. Review Coral Reef Day 7 Homework
11. Audio
3. Review Quiz
12. Embedded Content
4. Coral Reptiles Cont.
13. Interactive Question
5. Coral Reptiles-Turtles
14. Conclusions
6. Coral Reptiles-Sea Snakes
16. Closing
7.Coral Reptiles-Marine Iguanas
8. Coral Reptiles-Saltwater Crocodiles
day 7homework
These are all correct. I want to make it easier for you to write it. Would you rather have a page with lines to write or a Word copy to type in?
Agenda 4/3/2026
9. Homework
1. Check in
10.Check-Out
2. Review Coral Reef Day 7 Homework
11. Audio
3. Review Quiz
12. Embedded Content
4. Coral Reptiles Cont.
13. Interactive Question
5. Coral Reptiles-Turtles
14. Conclusions
6. Coral Reptiles-Sea Snakes
16. Closing
7.Coral Reptiles-Marine Iguanas
8. Coral Reptiles-Saltwater Crocodiles
Review Quiz-question 1
Review Quiz-question 2
Review Quiz-question 4
Review Quiz-question 5
Review Quiz-question 6
Review Quiz-question 7
Review Quiz-question 8
Review Quiz-question 9
Review Quiz-question 10
Review Quiz-question 11
Review Quiz-question 12
Review Quiz-question 13
Agenda 4/3/2026
9. Homework
1. Check in
10.Check-Out
2. Review Coral Reef Day 7 Homework
11. Audio
3. Review Quiz
12. Embedded Content
4. Coral Reptiles Cont.
13. Interactive Question
5. Coral Reptiles-Turtles
14. Conclusions
6. Coral Reptiles-Sea Snakes
16. Closing
7.Coral Reptiles-Marine Iguanas
8. Coral Reptiles-Saltwater Crocodiles
Coral Reptiles-Turtles
Do you remember what kind of turtle this was? That we talked about last time?
Hawksbill turtle
Eretmochelys imbricata
Hawksbill Nesting Sites
What do they eat? (Click the E)
What is their Habitat? (Click the H)
What do they look like? (Click the eye)
Why are they endangered?(Click the heart)
Agenda 4/3/2026
9. Homework
1. Check in
10.Check-Out
2. Review Coral Reef Day 7 Homework
11. Audio
3. Review Quiz
12. Embedded Content
4. Coral Reptiles Cont.
13. Interactive Question
5. Coral Reptiles-Turtles
14. Conclusions
6. Coral Reptiles-Sea Snakes
16. Closing
7.Coral Reptiles-Marine Iguanas
8. Coral Reptiles-Saltwater Crocodiles
Coral Reptiles-Sea snakes
Sea Snakes vs. Kraits
Sea Kraits
True Sea Snakes
NOT TRUE SEA SNAKES!
Spend Entire Lives at Sea!
+ info
+ info
- Give birth to live young in the water
- Examples:
1. Olive Sea Snake 2. Yellow-bellied Sea SnakeBasic Sea Snake Anatomy
10 Fascinating Sea Snake facts
Map
Video quiz-Go to nearpod
I'm ready!
instructions
Go to Marine Iguanas
Agenda 4/3/2026
9. Homework
1. Check in
10.Check-Out
2. Review Coral Reef Day 7 Homework
11. Audio
3. Review Quiz
12. Embedded Content
4. Coral Reptiles Cont.
13. Interactive Question
5. Coral Reptiles-Turtles
14. Conclusions
6. Coral Reptiles-Sea Snakes
16. Closing
7.Coral Reptiles-Marine Iguanas
8. Coral Reptiles-Saltwater Crocodiles
Coral Reptiles-Marine iguana
Marine Iguana (Amblyrhynchus cristatus)
Only lizards that dive to feed.
Use the reef to forage for underwater algae growing on rocks.
The Galapagos Islands are located in the eastern Pacific Ocean, located roughly 600 miles (1,000 km) west of Ecuador in South America.
Marine Iguanas ONLY live in the Galapagos Islands and have developed unique adaptations for this environment.
Salt Glands
Staying underwater
The Marine Iguana slows its body systems so it can stay underwater longer without having to come up for air. Afer an hour passes, its belly is full and it heads back to the rocks again to digest its meal.
Creates space for other marine species, contributing to the overall biodiversity of the archipelago's marine communities.
Algae Regulation: Prevents overgrowth and suffocation of other reef organisms.
Ecosystem Health Indicator: Highly sensitive to changes in their environment—such as temperature spikes during El Niño events that reduce algae supplies—their population health and survival rates serve as a crucial indicator for the overall health of the Galápagos marine ecosystem. Maintain health and balance of shallow reefs and rocky coastlines of the Galápagos Islands.
The male Marine Iguanas fiercely butt heads to determine superiority – sometimes getting rather violent.
During the Marine Iguana breeding season, the males develop reddish patches which vary from island to island, giving them the nickname "Christmas Iguanas". Mating Season is December to March, but varies from island to island.
On one particular island – Hood Island – the male will turn almost completely red.
Agenda 4/3/2026
9. Homework
1. Check in
10.Check-Out
2. Review Coral Reef Day 7 Homework
11. Audio
3. Review Quiz
12. Embedded Content
4. Coral Reptiles Cont.
13. Interactive Question
5. Coral Reptiles-Turtles
14. Conclusions
6. Coral Reptiles-Sea Snakes
16. Closing
7.Coral Reptiles-Marine Iguanas
8. Coral Reptiles-Saltwater Crocodiles
Coral Reptiles-Saltwater crocodiles (Crocodylus porosus)
Typically associated with estuaries and mangroves, these massive predators are known to venture into the open ocean and inhabit the waters around coral reefs, such as the Great Barrier Reef, to hunt.
Crocodile senses
What is their Habitat? (Click the H)
Reveal
What do they eat? (Click the E)
Crocodile Behavior (Click the black croc)
What do they look like? (Click the eye)
Generally avoid clear reef waters because they are ambush hunters that rely on camouflage. Pristine water makes them too exposed to effectively hunt reef fish.
Crocs in Reefs
It is rare to encounter saltwater crocodiles (estuarine crocodiles) on the outer Great Barrier Reef, they are an apex predator within the reef ecosystem, particularly around inshore fringing reefs and estuaries
+ info
Croc in Reef
Agenda 4/3/2026
9. Homework
1. Check in
10.Check-Out
2. Review Coral Reef Day 7 Homework
3. Review Quiz
4. Coral Reptiles Cont.
5. Coral Reptiles-Turtles
6. Coral Reptiles-Sea Snakes
7.Coral Reptiles-Marine Iguanas
8. Coral Reptiles-Saltwater Crocodiles
check out Question 1
check out Question 2
Agenda 4/3/2026
9. Homework
1. Check in
10.Check-Out
2. Review Coral Reef Day 7 Homework
3. Review Quiz
4. Coral Reptiles Cont.
5. Coral Reptiles-Turtles
6. Coral Reptiles-Sea Snakes
7.Coral Reptiles-Marine Iguanas
8. Coral Reptiles-Saltwater Crocodiles
Homework
Swimming for dinner
A Powerful Swimmer, the marine iguana, sweeps its tail from side to side as it searches for more seaweed.
Habitat: Lagoons, rocky coasts, coral reefs of estuaries of over 108 Countries.
where do crocs hang out?
Prefer Murky, dark, and still waters like mangroves, river mouths, and tidal flats. Strong swimmers and highly salt-tolerant. Can travel hundreds of kilometers across the open ocean, occasionally appearing on remote islands or outer reef sites while "on the move".
Salt glands are specialized organs in marine birds, reptiles, and some plants that excrete excess salt. Lacking Kleenex technology, marine iguanas often get hit with their own snot rockets. You’ll often see a white crust of salt on their heads and snouts.
Osteoderms: bony deposits—essentially "skin bones"—forming plates or nodules within the dermis of many reptiles.
Charles Darwin visited the Galápagos Islands in 1835 aboard the HMS Beagle, making crucial observations of unique species—such as finches, tortoises, and iguanas—that were adapted to specific, isolated environments. These findings directly influenced his groundbreaking theory of evolution by natural selection, detailed in On the Origin of Species.
Eating
The Marine Iguana wets its appetite on the shoreline seaweed/algae, but soon absorbs so much heat it has to dive into the depth to cool its body and eat its main course.