Heaviside's dolphin
A small dolphin species found off the coast of southern Africa.
Heaviside's dolphins inhabit the coastal waters of South Africa.
シャチ (orca) is a much larger, more widely known dolphin species. コシャチイルカ is named for its superficial resemblance to an orca, but it is a distinct, smaller species.
Katakana spelling is standard for this animal name.
Kanji spelling is rare; the word is usually written in kana.
The name combines 小 (small) + 鯱 (orca) + 海豚 (dolphin), literally 'small orca dolphin', referring to its orca-like appearance and small size.