Bonito and Skipjack

Bonito noun - Fish whose flesh is dried and flaked for Japanese cookery; may be same species as skipjack tuna.

Skipjack and bonito are semantically related. In some cases you can replace term "Skipjack" with "Bonito", this nouns are similar.

Skipjack noun - Medium-sized tuna-like food fish of warm Atlantic and Pacific waters; less valued than tuna.

Bonito and skipjack are semantically related. Sometimes you can use "Bonito" instead a noun "Skipjack".