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Family Tonnidae

Tun Shells

Tuns are large thin snails with soft parts too large to retract into the shell.  There is no operculum.  They emerge from sand at night to feed upon sea cucumbers.  Live animals are rarely seen by divers except at night and appear to be more common in very deep water where hermit-crabbed specimens are trapped.  The large egg mass of Tonna hawaiiensis is a coiled gelatinous ribbon with rows of beige eggs.

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HAWAII

Tonna perdix

PARTRIDGE TUN

 
Malea pomum

APPLE TUN

 
Tonna hawaiiensis 

HAWAIIAN BLACK-MOUTHED TUN