Left-handed Whelk 9-10" pieces The Derasa Clam (Tridacna derasa)

The Derasa Clam (Tridacna derasa) is the second-largest clam of the Tridacna clams

Colonies of this species have vertical

but individuals can be found on shallow reefs as well

Assorted pieces of broken Sea Glass in a variety of colors

Branches are typically 1 to 3 inches thick

Left-handed Whelk 9-10" pieces The Derasa Clam (Tridacna derasa)The Lightning Whelk, Sinistrofulgur sinistrum (Hollister, 1958), is one of the local molluscan celebrities, not only because of its large size, but also thanks to very special features that make this species truly remarkable. For instance, unlike most gastropods, which are right handed, the Lightning Whelk has a left handed shell (shell opening to the right with shell spire pointing up). Abnormally right handed Lightning Whelks are very uncommon, but