Yes

Eventually echinoderms do live in water.

well you see my good chum

a feather star is located in the middle of the Arabian desert while the "sea lilly" being derived from the british botonist CPHAT yeaman , is a derogatory name for the common house cat.

tube feet and

See horse

Yes they are cold-blooded. I passed by a link searching also and I answered cuz I just found out. Hope I help!

Anenome.

There are actually four major classes of echinoderms. These are Crinoidea, Asteroidea, Ophiuroidea, Eichionidea, Holothuroidea, and Concentricyloidea. The animals in these range from sea lilies to sea urchins.

An echinoderm is a spiny-skinned organism like a starfish. Leeches are soft bodied organisms, so they can't be echinoderms.

I think you're reading out of a low-level-zoology book, there's actually 14 characteristics. But some of them are really hard to understand, i cant even understand some of them myshelf, but for some that i can understand, I'll type it in

1. Body unsegmented, radial

2.No head, no brain

3.It has a water-vascular system

4.Excretory organs abset( it cant pee)

5.And they can regenerate lost parts.

The other 9 are really hard to understand, i think you wouldn't really understand them

Echinoderms are a phylum with usually 5 fold symmetry, spines and calcium carbonate plates.

yes

a woodchuck could chuck as much wood as a woodchuck could if a woodchuck could chuck wood.

No you are a mini Beast

The 5 living classes of echinoderms are Asteroidea (sea stars) Crinoidea (sea lillies) Echinoidea (sea urchins and sand dollars) Holothuroidea (sea cucumbers) Ophiuroidea (brittle stars and basket stars)

the same type as blue footed underwater donkeys.

ctenophorains(jellysfish) are spherical in shape much like a ball hence show radial symmetry. echinoderms(starfish) generally are flatter and have 5 arms hence are called pentaradial symmetry (can be cut in only 5 directions)

Some jellyfish prefer the cold waters. While other types of jellyfish love the warm waters. The jellyfish prefer to live in groups together. The can live in oceans and also freshwater.

For the sea star, they grap a clam with all five arms, then it pulls on the tightly closed shell with its tube feet. When the shell opens, the sea star forces its stomach out through its mouth and into the opening between the clam's shells. And then the digestive chemicals break down the clam's tissues, and the star sucks in the partially digested body of its prey.

Castes

No. Sponges belong to the phylum Porifera, which means 'pore bearing.' The have pores that are called incurrent vents, where water comes in, and excurrent vents, where water goes out. They are considered the most primitive of animals because they don't have any complex organs or tissues, so, for example, they don't have a circulatory system or a digestive system or a nervous system. Their cells are somewhat loosely structured in that some cells can move around from place to place in the sponge and there are some unspecialized cells that can become other kinds of cells. Also, they only have two layers of cells. There are some types of sponges that you can put through a sieve to separate all the cells but then the cells will go back together to recreate a sponge again.

Echinoderms are a completely different and more advanced phylum. They have organ systems and fixed (non-changing) cell types and more layers of cells. Also, if you put an echinoderm through a sieve, he's a gonner.