noun
fish farmer; pisciculturist
A person who raises fish, typically in aquaculture. The term 養魚家 is a straightforward compound of 養魚 (fish farming) and 家 (person engaged in a profession).
彼は養魚家として、鯉や鮎を育てている。
As a fish farmer, he raises carp and sweetfish.
養魚家になるには、水産学の知識が必要だ。
To become a fish farmer, knowledge of fisheries science is necessary.
漁師 is a fisherman who catches wild fish, whereas 養魚家 raises fish in controlled environments.
Compound of 養魚 (fish farming) and 家 (person engaged in a profession). The term is transparent and modern, with no obscure historical derivation.