Their coloring metallic blue on top and shimmering silver-white on the bottom helps camouflage them from above and below.
They can grow to 15 feet long and weigh over 1,000 pounds. They can swim up to 50 miles per hour when pursuing prey.
Species
There are eight species:
Albacore, Thunnus alalunga (Bonnaterre, 1788).
Bigeye tuna, Thunnus obesus (Lowe, 1839).
Blackfin tuna, Thunnus atlanticus (Lesson, 1831).
Pacific bluefin tuna, Thunnus orientalis (Temminck & Schlegel, 1844).
Northern bluefin tuna, Thunnus thynnus (Linnaeus, 1758).
Southern bluefin tuna, Thunnus maccoyii (Castelnau, 1872).
Longtail tuna, Thunnus tonggol (Bleeker, 1851).
Yellowfin tuna, Thunnus albacares (Bonnaterre, 1788
Atlantic bluefins are warm-blooded, which is a rare trait among fish, and are comfortable in the cold waters. Bluefin fish are found in Newfoundland and Iceland, as well as the tropical waters of the Gulf of Mexico and the Mediterranean Sea, where they go each year to spawn Their coloring metallic blue on top and shimmering silver-white on the bottom helps camouflage them from above and below.
Species of several other genera (all in the family Scombridae) also have common names containing tuna
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