noun
spider conch
A type of sea snail with a shell that has long, spider-leg-like projections. Scientific name Lambis lambis.
クモガイの殻は、長い突起が特徴的だ。
The shell of the spider conch is characterized by its long projections.
Compound of 蜘蛛 (くも, 'spider') and 貝 (がい, 'shellfish'), referring to the spider-like appearance of the shell.