YOU SAID:
Cuttlefish, Squid, Terrapin, Jellyfish, Crawfish, Crab, Octopus, Starfish, Shellfish, Seahorse
INTO JAPANESE
イカ、イカ、スッポン、クラ ゲ、ザリガニ、カニ、タコ、ヒトデ、貝、タツノオトシゴ
BACK INTO ENGLISH
Squid, calamari, soft-shelled turtle, jellyfish, crayfish, crab, Octopus, starfish, shells, seahorses
INTO JAPANESE
イカ、イカ、スッポン、クラ ゲ、ザリガニ、カニ、タコ、ヒトデ、貝、タツノオトシゴ
BACK INTO ENGLISH
Squid, calamari, soft-shelled turtle, jellyfish, crayfish, crab, Octopus, starfish, shells, seahorses
That didn't even make that much sense in English.