By Zach Yates

Relations What the bluefins closest relatives are…..

Kingdom Phylum etc…………………….. Kingdom ( animilia ) Phylum ( chordata ) Class ( actinopterygii ) Order ( perciformes ) Family ( scombridae ) Genus ( Thunnus ) Species (maccoyii ) ( orentalis ), or ( thynus ). There are many types of tuna, even three types of bluefin tuna. They are on the next slide.

Types of bluefin 1) The Pacific bluefin ( Thunnus orentalis ) (above ) 2) The Atlantic bluefin ( Thunnus thynus ) 3) The Southern bluefin ( Thunnus maccoyii ) (below)

Physical characteristics There is no difference between the three types of bluefin, nor male and female, but here are some of their characteristics. Caudal - the part of the tuna that connects its tailfin to its body.

Distribution The bluefin tuna is distributed all over the world with more than 80,000 tons being brought to fish markets every year.

Habitat The bluefin tuna lives near the equator, but is most common near Mexico and California.

Conservation status The pacific bluefin (Thunnus orentalis ) is of least concern and increasing, while the other species however are not doing well at all. The southern bluefin ( Thunnus maccoyii ) is the most endangered of all three bluefin tuna. It is critically endangered and decreasing. The Atlantic bluefin ( Thunnus thynus ) is also endangered and decreasing, but not as much as the southern bluefin.

Reproductive characteristics The bluefin tuna spawns when they are around seven to ten years old.They gather in big packs of 200 to 300 tuna to spawn. They lay about 3 million eggs a year, but only 1% of those eggs survive due to natural preditors.

Parental care The bluefin tuna leaves its eggs right after it lays them. Neither parents take care of the eggs.

Longevity and mortality The bluefin tuna lives up to 15 years in the wild ( although the record is up to 50 years ). Bluefin tuna do not die of old age in captivity, they are usually slaughtered, frozen, and sent to fish markets for a decent pay.

Seasonal patterns The Atlantic bluefin tuna’s patterns are through the Atlantic ocean.

Seasonal patterns Southern bluefins patterns are all through Australian waters

Seasonal patterns The pacific bluefin migrates through Californian and Mexican waters.

Seasonal patterns The bluefin tuna does not hibernate or undergo torpor

Diet The bluefin tuna feeds on squid, Fish, and other vertebrates and Invertebrates.

Predator relationships The bluefin tuna’s predators are mostly sharks and people. The sharks pose no threat to the tuna though.

Human relationships Humans pose the biggest threat to the bluefin tuna, over fishing and caging have brought this fish down to less than 50% of what it used to be in the 1950’s.

Fun facts!!!!!! Did you know……. Mitsubishi owns more than half of the bluefin fishing companies. The bluefin can cross the Atlantic ocean in less than 60 days. they have 2 types of muscle for cruising and having long darts of speed to catch prey. They are warm blooded. They can obtain a speed of 45 mph. The bluefin tuna has the longest migration of any animal on the planet.

Works cited

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