The smallest have about an inch diameter but different species get to be different sizes you have to be more specific in your questioning.
The giant clam, Tridacna gigas, or traditionally, pa'ua, is the largest living bivalve mollusc. One of a number of large clam species native to the shallow coral reefs of the South Pacific and Indian...
The Giant Clam can grow up to four feet
they most r brownish
yes there are at least i went there and my friend and i caught some!!.
Freshwater clams are filter feeders, so tiny foods like daphnia and rotifers and cyclops work well.
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