Radial symmtry
starfish
Anenome.
The mouth is found on the underside of an Echinoderm
the same type as blue footed underwater donkeys.
The Asteroidea class is the name of the class that contains starfish. However, brittle stars don't belong to this group. Most starfish have five appendages and all adult starfish have radial symmetry, although they are born with bilateral symmetry.
Their mouth is situated on the underside or oral surface.
There is no such thing as an "adult larva" , a larva is always immature ( a "baby"). If you mean "how is a sponge larva different from and adult sponge?" The answer is: 1. The larva is almost microscopic. You can't really see it with your bare eye. 2. the larva swims around. an Adult sponge stays attached to a surface for its lifetime and can't swim
A starfish is an echinoderm.
All echinoderms have radial symmetry
Echinoderm is an invertebrate and therfore it has no backbone
Yes sand dollar is an echinoderm.
No. A spider is an arachnid. A starfish is an example of an echinoderm.