100,000
yes it does
helps them stick to things
a starfish. durhh
The function of the ambulacral groove on a starfish is to open the shells of bivalves. It also hold the tubed feet of the starfish.
they can eat clams or mussels. ect. and they wrap their rays around it and their tubed feet stick to it. and pull the shell apart. then the cardiac stomach pushes out of the starfish and engulfs its prey.
The sea urchin is an example of the tubed feet and belongs to the phylum Echinodermata.
they have no feet they have tenacles
On the surface of a starfish you will find spines used for protection as armor, dermal gills surrounded the spines, a central disk, madreporite, arms and an anus. Underneath tubed feet used for movement, mouth, ambulacral grooves, and its mouth.
tubed feet
A star fish
0.5/1.0 miles per hour they are the fish fastestinthe ocean the sunfish is the best swimmers of allthe fishes in the world
it all matters on the size