FOR AGES 3 YEARS TO 18 YEARS
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Found in the coral reefs of the Indo-Pacific including the Red Sea and East Africa to French Polynesia, along with south to Australia, and north to Japan, the dogtooth tuna are an offshore species. It is generally a solitary fish or occurs in six or less of its kind. They are pelagic marine fish species, which belongs to the Scombridae family. Gymnosarda unicolor is their scientific name. They are big in size, with silver, dark blue colored skin and a strongly visible lateral line, along with strong fins. It is quite popular among people to go for dogtooth tuna fishing for marketed canned and tin fish.
They are solitary or small schooling fishes and migratory fish which generally lives in water temperature of between 70-80 degrees Fahrenheit. There are 15 species and a wide variety of subspecies, along with four main varieties of tuna that have been discovered so far. Given their large size, which can grow up to 130 kg and 3 m, they can be easily spotted. Dogtooth tuna (Gymnosarda unicolor), among other fish species, is considered to be one of the best-known delicacies in the world. Their impressive array of canine-like teeth gives it a dogtooth name. Read on for more fascinating facts.
You may also be interested to check out other similar species, including yellowfin tuna and skipjack tuna.
A dogtooth tuna (Gymnosarda unicolor) is a saltwater fish which are huge in size and can grow to more than 120 kg during maturity.
Given its structure of the ray fin it inherits, it belongs to the class of Actinopterygii.
The total number of these species that are present in the world's ocean is unknown. They give birth to millions of juvenile dogtooth tuna, but not all survive.
Generally known to live in tropical and moderate water temperatures. Since they are migratory fish, any change in weather conditions pushes them to migrate. They prefer saltwater rather than freshwater and are abundantly found in the Indian ocean.
Commonly found in the coral reefs as deep as 50-150 ft, they are also known to come inshore. Between 21-26 degrees Celsius water temperatures are highly preferred by them for their habitat. The dogtooth tuna habitat can be found commonly in a moderate sea depth.
Given their solitary nature, they tend to stay by themselves, and rarely, you can find them in small schools or in a group of three to six.
The dogtooth tuna (Gymnosarda unicolor), which is also known as a white tuna can generally live up to eight years. But most of them get caught by fishermen even before they live up to eight years.
The spawning season of the dogtooth tuna begins from the month of December to February. They are open water egg scatterers and non-guarders. Females can lay between 5-45 million eggs, and sometimes even more. The small, tiny eggs float near the surface and hatch within two days. The size of these fish babies is around 0.25 in long at birth, and they grow quite fast.
With millions of eggs that they produce every year, the population of this pelagic fish in many islands is increasing as much as they are caught for culinary purposes. Therefore, the conservation status of the dogtooth fish is of Least Concern.
Being a member of the mackerel species, their distinguishing features includes an elongated streamline body, anal spines, a mouth filled with sharp dog-like conical teeth on the upper jaw, with a large big head. They have two dorsal fins with the first one being large and spiny, and the second one behind its soft-rayed. As a mackerel fish, they have thin, smooth, and shiny skin with a strongly undulating lateral line. They have silver sides, a blue-green dorsal surface, and a white belly. This species has no scales since it exhibits countershading. The average weight of the fish is 705-1763 oz (20-50 kg), with a length of 15-50 in (40-127 cm). Their sharp teeth indicate that they are fierce predators of the sea.
We are known for sure that we would not want to get close to dogtooth fish while swimming or without safety equipment. Its big size, along with its sharp scary teeth and good swimming speed are signs that they can rip its food apart in several seconds. Therefore, we can say that they are not a cute fish.
Since they are solitary animals, they rarely communicate or any means of their communication hasn't been observed and is unknown.
The length of the dogtooth is between 15-50 in which is between 40-127 cm.
They are highly capable of reaching a high speed of up to 50 mph (80 kph) as they are among the predators of the sea with strong fins and sharp teeth. Their swimming speed increases rapidly, especially when they chase their target.
The average weight of this species can weigh between 705-1763 oz (20-50 kg).
There are no separate names given to describe the male and female of the species.
The young of the species are simply called baby or small fish.
Their daily diet consists of other smaller fishes, mackerel, reel fish, squids, or any fishes that fit its big jaw.
Dogtooth tuna meat is one of the popular and highly prized seafood delicacies in the world, and you can find it in many seafood restaurants in different recipes. It is rich in iron and omega fat, and is found to be quite healthy for humans. But you must make sure to have it in moderate due to its strong iron mercury content since over-consumption can be hazardous to health. Salad, sushi, and curry are the commonly known dogtooth tuna fish recipes. It is popularly served cold or chilled as sushi or cooked with spices and citrus ingredients in a curry. Commercial fishing or overfishing of the fish seem to pose a threat to the species population.
Considering their size and predatory nature, they would not make a great pet. They are scary and dangerous to be a pet. But many people have raised the fish for commercial fishing in and around the Pacific islands for culinary purposes and so that they do not pose a threat to the fish population.
The dogtooth tuna spearfishing record weighs 55 kg, while the all tackle record is 131 kg.
This species is known to form schools or groups of the same similar size and when encountered with small schooling fishes, feeding frenzies are common.
Large dogtooth tuna tend to be independent but sometimes swim with grey reef sharks.
The dogtooth tuna teeth can rip small fishes within seconds, and their meat is whiter than other types of tuna.
Dogtooth tuna can be caught with live baits or a trolled lure. Repeatedly reeling the lure can better entice these fishes to take the bait sometimes.
These fishes are usually used to make food products like canned fish, sushi, and can be bought frozen or chilled. They are a significant food source for humans.
These fishes have a wide distribution and can be found specifically in the Indian Ocean and the Pacific, south to Australia, on the coast of Japan, and other Pacific islands.
Here at Kidadl, we have carefully created lots of interesting family-friendly animal facts for everyone to discover! Learn more about some other fish including prawn, or albacore.
You can even occupy yourself at home by drawing one on our Doogtooth tuna coloring pages.
https://fishesofaustralia.net.au/home/species/723
https://www.fishbook.co.za/dogtooth-tuna-facts/
Read The Disclaimer
At Kidadl we pride ourselves on offering families original ideas to make the most of time spent together at home or out and about, wherever you are in the world. We strive to recommend the very best things that are suggested by our community and are things we would do ourselves - our aim is to be the trusted friend to parents.
We try our very best, but cannot guarantee perfection. We will always aim to give you accurate information at the date of publication - however, information does change, so it’s important you do your own research, double-check and make the decision that is right for your family.
Kidadl provides inspiration to entertain and educate your children. We recognise that not all activities and ideas are appropriate and suitable for all children and families or in all circumstances. Our recommended activities are based on age but these are a guide. We recommend that these ideas are used as inspiration, that ideas are undertaken with appropriate adult supervision, and that each adult uses their own discretion and knowledge of their children to consider the safety and suitability.
Kidadl cannot accept liability for the execution of these ideas, and parental supervision is advised at all times, as safety is paramount. Anyone using the information provided by Kidadl does so at their own risk and we can not accept liability if things go wrong.
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