Cytoplasmic inclusions specific to the sea urchin germ line.
D000818:Animals; D003593:Cytoplasm / Q000648:ultrastructure; D005260:Female; D005854:Germ Cells / Q000166:cytology*; D002479:Inclusion Bodies / Q000648:ultrastructure*; D008297:Male; D008854:Microscopy, Electron; D012617:Sea Urchins / Q000166:cytology*