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Feathered heylin Cheilinus undulatus in blue water among rocks

The spot-fin porcupinefish (Diodon hystrix), also known as the spotted porcupinefish, black-spotted porcupinefish or simply porcupinefish, is a member of the family Diodontidae.

Puffer is a small fish that lives in the Pacific and Indian Oceans. This fish can swim tail forward, it has no scales, but at the moment of danger it is able to swell and turn into a prickly ball.

Tetraodon Fahaka fish swims in aquarium on green background (Tetraodontidae)

Blackspotted Puffer fish is poisonous and puffs up its body like a balloon to avoid being eaten.

Colorful Coral Reef Teeming with Exotic Fish. Lively and colorful coral reef in a vibrant underwater world. Diverse array of tropical fish swimming freely in their aquatic environment, creating a mesmerizing scene for nature and animal enthusiasts alike.

Stripped puffer (Arothron meleagris), also known as the golden puffer. Wildlife animal.

Stellate puffer Arothron meleagris at coral reef in the sea

Showing fire-headed Cichlid fish (cichlasoma synspilum, vieja synspilum) in aquarium

Some puffer fish gathered in the aquarium.

Stock photo showing a large pufferfish in a filtered marine aquarium. This is a salt water puffer, although freshwater pufferfish are also available for fish keeping in tropical aquariums.

Brown puffer or ocular dog-fish with smiling face swim in blue water with qualle and coral in aquarium, Japan

Blackspotted Puffer fish (Arothron nigropunctatus)/ Dog-faced Puffer, a tropical marine fish (family Tetraodontidae), Indo-Pacific region

A blackspotted puffer fish glides gracefully in its tank at the Lisbon Oceanario, showcasing vibrant colors and ocean life.

Close-up view of a White-spotted puffer (Arothron hispidus) arothron meleagris

Spot-fin Porcupinefish (Chilomycterus spinosus) or Brown Burrfish - Marine fish

Big Giant grouper fish sea life underwater

Cyclopterus lumpus, the lumpsucker or lumpfish, is a species of marine fish in the family Cyclopteridae lumpsuckers

$Birdbeak Burrfish Cyclichthys orbicularis occurs in tropical waters of the Indo-West Pacific from the Red Sea and East Africa to the Philippines, north to southern Japan, south to Australia and New Caledonia and in the Southeast Atlantic at the south coast of South Africa in a depth range from 9 to 170m, max. length 30cm. \n\nThe nocturnal species inhabits clear protected reefs with sponge and algal habitats, staying often in large sponges during the day. Cyclichthys orbicularis occasionally occurs on reefs, but usually over sand and mud bottoms. \nThe species feeds on hard-shelled invertebrates. \n\nInterestingly, this fish can puff up its body by ingesting water, transforming into a spiny ball as a defense mechanism, which reduces its mobility but deters predators. His chemical defense mechanism is more effective than the swimming away: Tetrodotoxin (TTX) is a potent neurotoxin found in various marine organisms, including Cyclichthys orbicularis. It can be lethal to non-resistant fish species. The estimated lethal dose of TTX in humans is around 2 mg of pure toxin. Even small amounts can cause severe symptoms. \n\nThis specimen was encountered in the Lembeh Strait, North Sulawesi, Indonesia\n1°27'13.104 N 125°14'14.634 E at 13m depth$

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