Jellyfish have a gelatinous bell-shaped body with tentacles lined with stinging cells. They move through the water by rhythmic contractions and drink water through their mouth to expel it as a propulsion method. Jellyfish populations are expanding globally due to overfishing reducing their predators and excess nutrients disturbing marine ecosystems which allows them to proliferate. Some jellyfish like the crystal jelly use bioluminescence to warn of their toxicity to predators.

1. jellyfish

2. jellyfish
They are marine animals belonging to the
phylum Cnidaria; They are pelagic,
gelatinous body , shaped like a bell hanging
a tubular handle, the mouth and at the lower
end, sometimes prolonged by long tentacles
loaded with stinging cells. Jellyfish have
roamed the seas for at least 500 million
years.

4. Jellyfish
To move through the water it is driven by
rhythmic contractions of its entire body; it
drinks water, which is introduced into the
cavity and expels it, using it as a " propeller”.
Jellyfish have tentacles formed by stinging
cells, which used to capture prey and as a
defense. These cells contain a capsule with
a toxic filament. Upon contact with a dam,
the filaments are ejected and inject venom.

6. Jellyfish
Jellyfish populations are expanding
globally as a result of overfishing of
their natural predators and the
availability of excessive nutrients.
When marine ecosystems become
disturbed jellyfish can proliferate

8. jellyfish
Some types of jellyfish are
bioluminescent. Jellyfish use their
bioluminescence to warn predators
of their toxicity. An example of
bioluminescent jellyfish is the
hydromedusa crystal jelly
(Aequorea victoria) .

9. By: Mari Carmen

10. By: Mari Carmen