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gasterosteiform
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Lined seahorse (Hippocampus erectus) stickleback gasterosteiform leafy sea dragon three-spined stickleback lined seahorse
Five facts about seahorses
pipefish trumpetfish
For Students
Lined seahorse (Hippocampus erectus)
gasterosteiform summary
Quizzes
Sea otter (Enhydra lutris), also called great sea otter, rare, completely marine otter of the northern Pacific, usually found in kelp beds. Floats on back. Looks like sea otter laughing. saltwater otters
Animal Group Names
Lion (panthera leo)
Deadliest Animals Quiz
Young chimpanzee dressed in a shirt and sweater vest, scratching his head thinking. (primates)
Wild Words from the Animal Kingdom Vocabulary Quiz
Mute swan with cygnet. (birds)
Match the Baby Animal to Its Mama Quiz
vulture. An adult bearded vulture at a raptor recovery center. The Gypaetus barbatus also known as the Lammergeier or Lammergeyer, is a bird of prey and considered an Old World vulture.
Animal Factoids
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Tiger shark (Galeocerdo cuvieri).
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Rural Irish landscape, Sligo, Ireland.
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gasterosteiform: Media

fish order
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Videos

Five facts about seahorses
Learn five quick facts about seahorses.
Video: Encyclopædia Britannica, Inc.

Images

Lined seahorse (Hippocampus erectus)
Lined seahorse (Hippocampus erectus).
Des Bartlett/Bruce Coleman Ltd.
stickleback
Three-spined stickleback (Gasterosteus aculeatus).
© slowmotiongli—iStock/Getty Images
gasterosteiform
Representative gasterosteiform fishes.
Encyclopædia Britannica, Inc.
leafy sea dragon
Leafy sea dragon (Phycodurus eques).
Encyclopædia Britannica, Inc.
three-spined stickleback
Three-spined stickleback (Gasterosteus aculeatus).
Encyclopædia Britannica, Inc.
lined seahorse
Lined seahorse (Hippocampus erectus).
Encyclopædia Britannica, Inc.
pipefish
Northern pipefish (Syngnathus fuscus).
Encyclopædia Britannica, Inc.
trumpetfish
Chinese trumpetfish (Aulostomus chinensis).
Encyclopædia Britannica, Inc.
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