If salt water causes things shrivel and fresh water causes things to grow then why is the fish in the ocean so big and the fish in fresh water so small or is it beause the ocean monumental in size the fish will be too like a plecostomus in a 50 gal. tank? ?

Crinoids, also known as sea lilies, appear to be sea plants but are not plants at all. crinoids are an echinoderm species which uses anchoring structures called holdfasts to attach themselves to the sea floor. crinoids were most abundant in pennsylvania during the mississippian period, which ranged from 375 to 320 million years ago. fossils of the crinoids shows that during most of this time pennsylvania was that provided favorable conditions for crinoid growth. a) glacial terrain b) a dry and sandy plain c) mostly mountain ranges d) covered by warm, shallow seas