red carp; golden carp
Refers to an ornamental variety of common carp (Cyprinus carpio) with red or golden coloration, often kept in ponds.
庭の池に緋鯉が三匹泳いでいる。
Three red carp are swimming in the garden pond.
rosy goatfish; yellow-striped goatfish
Standard kanji spelling for this ornamental carp.
Kana spelling is common in everyday writing, especially when the kanji is not essential.
Compound of 緋 (hi, 'scarlet') and 鯉 (koi, 'carp'). The reading ひごい is a straightforward combination of the two characters' readings.