Bluefin tuna Bluefin tuna is a type of tuna fish that is known for its rich, flavorful meat and large size. It is one of the largest tuna species, and can weigh over 1,000 pounds and grow up to 10 feet in length. Bluefin tuna are highly migratory and travel long distances each year in search of food and breeding grounds.

Bluefin tuna are not egg-laying fish, they are live-bearing fish which means that they give birth to live young. When bluefin tuna reproduce, the female releases eggs which are then fertilized internally by the male, and the young develop within the female until they are born. Bluefin tuna typically produce a large number of eggs, with a single female able to produce millions of eggs in a single spawning season.

Scientific name: Thunnus thynnus Scientific classification: Phylum: Chordata Class: Actinopterygii Order: Perciformes Family: ScombridaeDescription of Northern Bluefin Tuna The pectoral fins are long and rigid and are positioned just behind the conical head, with a large mouth and eyes. The back of the fish is a deep bluish-purple and the underside is shimmering silver.