Mollusk

Mollusks were members of the very large and diverse phylum of invertebrate animals known as Mollusca. Mollusks ranged from minute snails and clams to large organisms such as squid, cuttlefish, and octopus.

Quark served both jumbo Romulan mollusks and jumbo Vulcan mollusks in his establishment on Deep Space 9. 

Examples of mollusks

 * Clam
 * Cuttlefish
 * Edosian slug
 * Jumbo Romulan mollusk
 * Jumbo Vulcan mollusk
 * Nautilus
 * Octopus
 * Oyster
 * Snail
 * Squid