No. they are mollusks
Actually, echinoderms are more closely related to humans than molluscs.
Cnidarians are true radially symmetrical animals. They include jellyfish. Echinoderms (like starfish) also display radial symmetry. It is important to note that the larvae of echinoderms are bilaterally symmetrical and that Echinoderms evolved from a bilaterally symmetrical group.
Jellyfish can sting you generally. Starfish cannot. Jellyfish are cnidarians and starfish are echinoderms. Jellyfish are 95% water. Starfish are not. Jellyfish can sometimes get quite huge, weighing over 500 pounds and some jellyfish have tentacles 100 feet long. Starfish don't get that big. Their diet is different. Their reproduction differs.
Many- all cephalopods, such as jellyfish and octupus. Also the echinoderms which are starfish, sea cucumbers, etc.
Echinoderms (ex: starfish), cnidarians (ex: jellyfish) and and some vermiforms have longitudinal radial symmetry.
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)
The echinoderm's mouth is the shape of a pentagon and it has 5 teeth-like teeth. The difference between the echinoderm's and the jellyfish's radial symmetry is that the jellyfish shows radial symmetry and is spherical in shape. The echinoderms are flatter, have five arms and have pentaradial symmetry.
Echinoderms are in the Animalia kingdom.
The scientific name for Echinoderms is Echinodermata.
The sea stars symmetry is radial symmetry as well as jellyfish.
Echinoderms belong to the phylum Echinodermata.
As of yet, there is no known species of parasitic echinoderms.