1) Mantis crab 2) Mantis prawn 3) Mantis shrimp 
Squilla is a genus of mantis shrimp. It includes the following species: ...
• (n.) Any one of numerous stomapod crustaceans of the genus Squilla and allied genera. They make burrows in mud or beneath stones on the seashore. Called also mantis shrimp. See Illust. under Stomapoda.
<zoology> Any one of numerous stomapod crustaceans of the genus Squilla and allied genera. They make burrows in mud or beneath stones on the seashore. Called also mantis shrimp. ... Origin: L, a sea onion, also, a prawn or shrimp. ... (10 Mar 1998) ... 
Squil'la noun ; plural English Squillas , Latin Squillæ . [ Latin , a sea onion, also, a prawn or shrimp. See Squill .] (Zoology) Any one of numerous stomapod crustaceans of the genus Squilla and allied genera. They make burrows in mud or beneath stone...
[n] - a kind of mantis shrimp
mantis prawn noun a kind of mantis shrimp