# Bluefin Tuna (*Thunnus thynnus*) The Bluefin Tuna is a large, fast fish found in the deep, cool waters of the ocean. It has a sleek body built for speed and is known for its incredible swimming abilities. - **Category:** [Fish](https://www.snappit.app/explore/categories/fish) - **Rarity:** Common - **Danger:** 2/5 · Low - **Habitat:** Deep Sea - **Also known as:** Atlantic Bluefin Tuna, Giant Bluefin Tuna ![Bluefin Tuna](https://res.cloudinary.com/drieglelr/image/upload/v1771426229/objects/5922.jpg) ## Appearance The Bluefin Tuna has a torpedo-shaped body with a metallic dark blue or black back and a silvery-white belly. Its distinctive yellow finlets run along its back and underside, leading to a powerful, crescent-shaped tail. ## Taxonomy - **Kingdom:** Animalia - **Phylum:** Chordata - **Class:** Actinopterygii - **Order:** Perciformes - **Family:** Scombridae - **Genus:** Thunnus ## Interesting facts - Bluefin tuna have special sensory pits to detect tiny water vibrations! - Some bluefin tuna cross entire oceans, traveling over 10,000 kilometers! - Their muscles can heat up to 20°C warmer than the surrounding ocean water! - They must swim constantly to breathe, or they will drown! ## Special abilities - **Ocean Speedster:** Bluefin Tuna has a super streamlined body and powerful tail that helps them swim incredibly fast, up to 70 km/h. - **Retractable Fins:** Bluefin Tuna can pull their pectoral fins into grooves on their body, making them extra aerodynamic for high-speed swimming. ## Measurements & details - **Length:** 100-300 cm - **Weight:** 100-600 kg - **Lifespan:** 20-40 years - **Swim Speed:** 70 km/h - **Maximum Depth:** 1000 m - **Water Type:** Saltwater ## Diet & Feeding Bluefin Tuna are swift ocean predators, eating many kinds of smaller fish, squid, and crustaceans. - **Primary Foods:** Mackerel, Herring, Sardines, Squid, Crustaceans - **Foraging Method:** Pursuit ## Ecological connections - **Hunts:** [Atlantic Mackerel](https://www.snappit.app/explore/atlantic-mackerel) (*Scomber scombrus*) — A common fast-swimming prey fish. - **Hunts:** European Pilchard (*Sardina pilchardus*) — Forms large schools which tuna hunt. - **Hunts:** Northern Shortfin Squid (*Illex illecebrosus*) — A significant part of their deep-water diet. ## Traits - [Piscivorous](https://www.snappit.app/explore/traits/piscivorous): Piscivorous organisms are animals that primarily subsist on a diet of fish. - [Thermoregulating](https://www.snappit.app/explore/traits/thermoregulating): Thermoregulating organisms maintain a stable internal body temperature despite fluctuations in the external environment. - [Carnivorous](https://www.snappit.app/explore/traits/carnivorous): This trait identifies organisms whose diet consists entirely or primarily of animal tissue. - [Speedster](https://www.snappit.app/explore/traits/speedster): This trait identifies organisms that exhibit exceptional swiftness in movement for hunting, escape, or travel. - [Aquatic](https://www.snappit.app/explore/traits/aquatic): Aquatic habitats encompass environments where organisms live predominantly in water, including oceans, rivers, lakes, and wetlands. - [Marine](https://www.snappit.app/explore/traits/marine): Marine habitats encompass all saltwater environments of the Earth's oceans, supporting an immense diversity of aquatic life. - [Migratory](https://www.snappit.app/explore/traits/migratory): Migratory animals undertake seasonal movements from one region to another, typically in response to changes in climate or food availability. - [Threatened](https://www.snappit.app/explore/traits/threatened): Threatened status denotes a species likely to become endangered in the foreseeable future without effective conservation interventions. ## Collections - [Fish](https://www.snappit.app/explore/collections/fish) ## Safety **Danger:** 2/5 · Low Bluefin Tuna are wild animals and should be admired from a distance. ## Frequently Asked Questions ### How to identify Bluefin Tuna? Look at body shape, where the fins sit and their outline, mouth position, stripes and spots. Young fish and breeding adults can wear different patterns, and aquarium color varieties can look nothing like wild fish. Fish Identifier: upload a photo and compare the visible details. ### How long is Bluefin Tuna? 100-300 cm ### How much does Bluefin Tuna weigh? 100-600 kg ### How long does Bluefin Tuna live? 20-40 years ### What does Bluefin Tuna eat? Bluefin Tuna are swift ocean predators, eating many kinds of smaller fish, squid, and crustaceans. ### How fast can Bluefin Tuna swim? 70 km/h ### Where is Bluefin Tuna usually found? Deep Sea ### How does Bluefin Tuna hunt? Pursuit ## More Fish - [Rainbow Trout](https://www.snappit.app/explore/rainbow-trout) (*Oncorhynchus mykiss*) - [Brown Trout](https://www.snappit.app/explore/brown-trout) (*Salmo trutta*) - [Brook Trout](https://www.snappit.app/explore/brook-trout) (*Salvelinus fontinalis*) - [Lake Trout](https://www.snappit.app/explore/lake-trout) (*Salvelinus namaycush*) --- Source: [Bluefin Tuna: Facts & Places to See — Snappit](https://www.snappit.app/explore/bluefin-tuna)