Echinoderms

why do people put starfish in the window

No an octopus is a mollusk, just like squids, clams, and oysters. Echinoderms are sea stars, sea urchins, sea cucumbers, sea lilies, sand dollars, basket stars, brittle stars, and feather stars.

Usually in the middle underneath the animal. However the mount can also migrate forward, to the side of the animal in an irregular echinoid.

they are ectothermic because their body temp. is the same as their environment.

Glass, surprise.

No, they are reptiles.

An echinoderm has no spine and either lives in water or terrestrial habitats, they have no brain or skull either. Their skin is made of tiny plates that give it a rough and sometimes spiny feel

Ex:

Starfish, sea urchins and over 50,000 more

Some of them are predators, most starfish are, they eat slow moving creatures like barnacles or clams

A few filter feed

And some eat algae scraped off of rocks

Hope that helped

Yes They Can

On the ventral side of an echinoderm (say, a sea star, for example) there are hundreds of tiny feet arranged into rows on each appendage. These are called tube feet. By varying the internal water pressure, the echinoderm can extend and contract its tube feet for locomotion, food collection, and respiration

Approx. 7, 000 species that fall into five clades(sub-groups)

It is at the bottom of the starfish

First, they are incredibly good at catching and killing their food with very little movement. they have poison which can incredibly help them survive and thrive.

respond

sea lilies and feather stars

A starfish reserves energy. They are one of the only creatures that can do this "manually." They will save it up when in warmer temperatures, and use it in colder temperatures to warm themselves up.

i don't know please don't ask me

Five fold radial symmetry, vibrant colors, spiny skin

It's a fish

Brittle stars are echinoderms with a skeleton of embedded calcite ossicles (little bones) which fuse to form an armor plate. The plates are covered by the epidermis, so that you can tell where the plates/ossicles are, but you cannot see them directly.

The brittle star has very flexible arms that can brake of in situations involving a predator. The broken arms will continue to wiggle and move to distract said preditor, allowing the brittle star itself to escape.

Appendages.............in multiples of........numbers........and clouds

Echinoderms are invertebrates with an internal skeleton and a system of fluid-filled tubes called a water vascular system. There are four major groups of echinoderms: sea stars, brittle stars, sea urchins, and sea cucumbers.