9 letters · 18 points in Scrabble
noun meat of edible aquatic invertebrate with a shell (especially a mollusk or crustacean)
noun invertebrate having a soft unsegmented body usually enclosed in a shell
originInherited from Middle English schellefyssch, from Old English sċielfisċ. Equivalent to shell + fish.
Etymology from Wiktionary, CC BY-SA 3.0