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 . This shell is delicate, with a brown or pale brown surface, almost translucent and has quite flat ribs.
<div align=center> Right and left valve of the same specimen:
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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.