Yellowtail meaning : Yellowtail amberjack (Seriola lalandi). A fish native to the northwest Pacific, often used in sushi, the Japanese amberjack (Seriola quinqueradiata). Any of various fish with yellow tails, including: A European moth (Euproctis similis) The yellow-tailed black cockatoo (Calyptorhynchus funereus), a large cockatoo native to the south-east of Australia. The yellow-tailed oriole (Icterus mesomelas), a passerine bird in the New World family Icteridae. The yellow-tailed woolly monkey (Oreonax flavicauda), a New World primate endemic to Peru. Having a yellow tail.