blackfin tuna

noun

: a tuna (Thunnus atlanticus) that is found off the Atlantic coast of America from Massachusetts to Brazil and is bluish-black above and white below with silvery-gray sides and dark-colored fins

Fishermen focused on pelagic big game species are reporting consistent action on blackfin tuna, along with a mix of mahi mahi, yellowfin tuna, amberjack and wahoo in the warm waters off of the Outer Banks.

—Bob Jones, News Journal (Wilmington, Delaware), 12 Jan. 2012

Word History

First Known Use

1945, in the meaning defined above

The Ultimate Dictionary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

1. Expanded definitions
2. Detailed etymologies
3. Advanced search tools
4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now