Flexopecten hyalinus, the hyaline scallop, is a species of saltwater clams, a scallop, a marine bivalve mollusc in the family Pectinidae, the scallops.

The shell of an adult Flexopecten hyalinus can be as large as 20–30 millimetres (0.79–1.18 in).

This shell is delicate, with a brown or pale brown surface, almost translucent and has quite flat ribs.

Right and left valve of the same specimen: This species can be found in the Mediterranean Sea, from Italy and Croatia to Greece, under rocks or dead leaves of algae, usually at depths of about 10 m. This Pectinidae-related article is a stub.

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