noun
tadpole shrimp; shield shrimp
Refers to small freshwater crustaceans of the order Notostraca, especially Triops species, known for their shield-like carapace. Often kept as pets or studied in schools.
田んぼでカブトエビを見つけた。
I found a tadpole shrimp in the rice paddy.
カブトエビは生きた化石と呼ばれている。
Tadpole shrimps are called living fossils.
Compound of 兜 (kabuto, 'helmet') + 海老/蝦 (ebi, 'shrimp'), from the helmet-like shape of the carapace. The exact derivation is straightforward; the word is a modern descriptive compound.