Observe the hagfish's horny teeth and scaleless exterior covering a cartilaginous skeleton
Observe the hagfish's horny teeth and scaleless exterior covering a cartilaginous skeleton
Hagfishes are primitive, jawless fish.
Encyclopædia Britannica, Inc.
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Encyclopædia Britannica, Inc.Hagfishes are primitive, jawless fish.
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Encyclopædia Britannica, Inc.Marine iguanas (Amblyrhynchus cristatus) of the Galapagos Islands.
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Encyclopædia Britannica, Inc.These snakes mean business.
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Encyclopædia Britannica, Inc.A green sea turtle (Chelonia mydas) laying eggs on a beach and hatchlings scrambling toward the sea.
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Encyclopædia Britannica, Inc.Most anoles can change colour. The brightly coloured throat fan, or dewlap, signals possession of a territory and attracts females.
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Encyclopædia Britannica, Inc.Contrary to popular belief, chameleons don't actually change color to blend into their background.
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Encyclopædia Britannica, Inc.Ray-finned fishes are found in freshwater and saltwater habitats around the world and have evolved a wide variety of body plans.
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Encyclopædia Britannica, Inc.Learn about several types of turtles and lizards—such as Gila monsters, snapping turtles, and Komodo dragons—that are capable of harming humans.
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Encyclopædia Britannica, Inc.Birds descended from dinosaurs, but they don't have their ancestors' bite.
Transcript
NARRATOR: Hagfishes, together with lampreys, are considered the most primitive living fishes. The hagfish has a scaleless, eel-like body and a cartilaginous skeleton. It lacks paired fins and jaws. Its mouth is a round, suckerlike opening surrounded by short, horny teeth. The hagfish usually feeds on dead fish and marine invertebrates.