Octavio’s Book

CnidariansCnidarians

Cnidarians are Invertebrates (no backbones)

The hydras

and jellyfishes

are cnidarians

The jellyfish can

be a few inches in

width and the

largest can be

over 6 feet

Cnidarians are aquatic animals, mostly marine

The anemone and the redcoral are cnidarians

The body of a cnidarians is a sack with an opening.

This opening is surrounded by many poisonous tentacles

The Portuguese Man of War is a colony of poisonous cnidarians

Some cnidarians have the Medusa form, and living free

In the medusa form the tentacles dangle down

The sea nettles have medusa form

Others cnidarians have the

Polyp form, and living in colonies

Polyps form is when the cnidarians are connected to the bottom

The brain coral

and the pillar

coral have the

polyps form

The coral polyps

form reefs that

can stretch for

thousand of miles

The largest coral

reef is the Great

Barrier Reef at the

northeast of

Australia

The coral reef

are the home of

an amazing

variety of animals

There are more than 11,000 species

of Cnidarians