jellyfish_euro-svt

JELLYFISH

Presentation

By Joséphine, Morgane and Sana

Are they immortal ?

summary

1. The species

2. The reproduction

3. Problematic's answer

the specie(s)

Black Sea Nettle

Tentacules with stinging cells

Umbrella-shaped main body

Jellyfish

- mainly free-swimming animals because of the propulsions- jellyfish can form vast swarms, but can live alone and independently of others- They are different depending on the depth of their habitat- stinging cells are used to capture preys or to fight against predators- thousands of swimmers worldwild injured each years

+ info

Cauliflower Jellyfish

Fried Egg Jellyfish

White-spotted Jellifish

Crystal Jellyfish

Reproduction

How ?

Reproduction

Aurelia Aurita

Reproductive organs

EXAMPLE

Problematic

Are jellyfish immortal or not ?

Turritopsis dohrnii

The immortal jellyfish

Turritopsis dohrnii

Thank you!

- has a large impact on fluorencence microscopy

In biology

- the green fluorescent protein used by some species for bioluminescence

Turritopsis dohrnii

a hydrozoan

Wich passed most of their life in a hydoid stage.