noun
himedaka; gold-colored Japanese rice fish
A gold-colored breed of the Japanese rice fish (Oryzias latipes), commonly kept as an ornamental fish.
See also: メダカ
ヒメダカは観賞魚として人気がある。
Himedaka are popular as ornamental fish.
近所のペットショップでヒメダカを買った。
I bought some himedaka at a local pet shop.
メダカ is the common Japanese rice fish, while ヒメダカ is a specific gold-colored breed.
Compound of 緋 (hi, 'scarlet') and メダカ (medaka, 'Japanese rice fish'). The exact derivation is uncertain, but the name refers to the fish's reddish-gold coloration.