Translation of "Mollusks" in Korean

All the mollusks she is capturing, they're quite easy to catch, but they've got these incredibly hard shells.

‎문어가 잡는 연체동물은 ‎사냥하기 꽤 수월하지만 ‎단단한 껍데기에 싸여 있습니다

But some of these mollusks will only relax if that drill is precisely in the apex of the shell, on the abductor muscle.

‎개중에는 힘이 쭉 빠지는 ‎연체동물도 있습니다 ‎껍데기의 꼭대기에 ‎정확히 구멍을 뚫으면 되죠 ‎벌림근에요