石蚕いさごむし

noun

caddisfly larva; caddis worm

Refers to the aquatic larva of the caddisfly, known for building protective cases from sand, stones, or plant material. Also called 飛螻蛄 (とびけら) for the adult insect.

See also: トビケラ

• 川かわ底ぞこの石いしをひっくり返かえすと、いさごむしがくっついていた。

  When I turned over a stone on the riverbed, a caddis worm was attached to it.

• いさごむしは小こ石いしや砂すなで巣すを作つくる。

  Caddis worms build cases out of small stones and sand.