Plaice

Plaice is the common name of three species of flatfishes:

 Alaska plaice, Pleuronectes quadrituberculatus.
 American plaice, Hippoglossoides platessoides.
 European plaice, Pleuronectes platessa

Plaice can also mean:

 USS Plaice (SS-390), a Balao-class submarine
 PLAICE, an open source hardware FLASH programmer, memory emulator, and logic analyzer