海豚(いるか)dolphin (or other small toothed whales, such as porpoises, belugas, etc.)

水族館(すいぞくかん)の海豚(いるか)のショーは大人気(だいにんき)です。

The dolphin show at the aquarium is very popular. {dolphin (or other small toothed whales, such as porpoises, belugas, etc.)}

海豚(いるか)はクジラ目(もく)で小型(こがた)のハクジラの総称(そうしょう)である。

"Dolphins are generally referred to as small types of toothed whales, such as porpoises, belugas, etc." {dolphin (or other small toothed whales, such as porpoises, belugas, etc.)}

海面(かいめん)から飛(と)び上(あ)がるイルカの赤(あか)ちゃんを船(ふね)から眺(なが)める。

Watching a baby dolphin leap from the sea surface from the boat. {dolphin (or other small toothed whales, such as porpoises, belugas, etc.)}

イルカは知能(ちのう)が高(たか)く、その多(おお)くは群(む)れをなして泳(およ)ぎ魚類(ぎょるい)を主食(しゅしょく)とするのだとか。

Dolphins are highly intelligent, and it is said that many of them swim in groups and primarily eat fish. {dolphin (or other small toothed whales, such as porpoises, belugas, etc.)}

トレーナー：「海豚(いるか)にちょっと噛(か)まれちゃったけどさ、心配(しんぱい)には及(およ)ばないよ。」

Trainer: "I got nipped by a dolphin, but there's no need to worry." {dolphin (or other small toothed whales, such as porpoises, belugas, etc.)}