All species - Project Seahorse (2024)

Other common names: Pot-bellied seahorse

Range: Australia & New Zealand

Size: up to 35 cm (13.8 in)

Red List status: Least Concern

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Range: West Africa

Size: up to 19 cm (7.5 in)

Red List status: Vulnerable

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Other common names: western Australian seahorse, western spiny seahorse

Range: Northern Australia

Size: up to 16 cm (6.3 in)

Red List status: Least Concern

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Range: Indo-Pacific

Size: up to 15 cm (5.9 in)

Red List status: Vulnerable

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Range: Indo-Pacific

Size: Up to 2.4 – 2.7 cm (0.9 – 1.1 in)

Red List status: Data Deficient

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Other common names: knobby seahorse, short-headed seahorse, short-snouted seahorse

Range: Southern Australia

Size: up to 10 cm (3.9 in)

Red List status: Least Concern

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Range: Western Indian Ocean

Size: up to 10 cm (3.9 in)

Red List status: Data Deficient

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Other common name: Cape seahorse

Range: Southern Africa

Size: up to 12 cm (4.7 in)

Red List status: Endangered

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Range: China

Size: up to 13.3 cm (5.2 in)

Red List status: Data Deficient

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Range: Indo-Pacific

Size: up to 2.6 cm (1 in)

Red List status: Data Deficient

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Range: Southeast Asia

Size: up to 18.7 cm (7.4 in)

Red List status: Vulnerable

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Other common name: high-crowned seahorse

Range: Japan & South Korea

Size: up to 12.7 cm (8.7 in)

See Also

Seahorses | National Geographic

Range: Red Sea to Pakistan

Size: up to 14 cm (5.5 in)

Red List status: Least Concern

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Range: Australia

Size: up to 4.4 cm (1.7 in)

Red List status: Data Deficient

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Other common name: Kellogg’s seahorse

Range: Indo-Pacific to E. Africa to China & Australia

Size: up to 28 cm (11 in)

Red List status:Vulnerable

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Other common names: common seahorse, estuary seahorse, yellow seahorse, spotted seahorse

Range: Indo-Pacific to E. Africa to China & Australia

Size: up to 17 cm (6.7 in)

Red List status:Vulnerable

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Range: S. Australia

Size: up to 5 cm (2 in)

Red List status: Data Deficient

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Other common name:lemur-tail seahorse

Range: Japan & Korea to Thailand

Size: up to 8 cm (3.2 in)

Red List status:Vulnerable

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Range: South Africa

Size: up to 2.2 cm (0.9 in)

Red List status: Not Evaluated

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Range: Indo-Pacific to E. Africa to China & Australia

Size: up to 6.5 cm (2.6 in)

Red List status: Data deficient

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Range: Brazil to Argentina

Size: up to 10.3 cm (4.1 in)

Red List status: Vulnerable

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Range: Australia

Size: up to 22 cm (8.7 in)

Red List status: Least Concern

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Other common name: Pontoh’s pygmy seahorse

Range: Indo-Pacific

Size: up to 1.7 cm (0.7 in)

Red List status: Least Concern

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Other common name: dwarf thorny seahorse

Range: New Caledonia

Red List status: Data Deficient

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Other common name: longsnout seahorse

Range: North Carolina (USA) to Brazil

Size: up to 17.5 cm (6.9 in)

Red List status: Near Threatened

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Other common name: Satomi’s pygmy seahorse

Range: Indo-Pacific

Size: up to 1.4 cm (0.6 in)

Red List status: Data Deficient

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Other common names: Shiho’s seahorse, painted seahorse

Range: Japan

Size: up to 8 cm (3.2 in)

Red List status: Least Concern

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Other common name: Queensland seahorse

Range: Indo-Pacific

Size: up to 17.2 cm (6.8 in)

Red List status:Vulnerable

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Range: W. Australia

Size: up to 20 cm (7.9 in)

Red List status: Data Deficient

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Other common names: flat-faced seahorse, longnose seahorse, low-crowned seahorse

Range: Indo-Pacific

Size: up to 17 cm (6.7 in)

Red List status:Vulnerable

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Range: Seychelles

Size: up to 6.1 cm (2.4 in)

Red List status: Data Deficient

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Other common name: Walea pygmy seahorse

Range: Indonesia

Size: up to 1.8 cm (0.7 in)

Red List status: Not Evaluated

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Other common names: New Holland seahorse, Sydney seahorse

Range: Solomon Islands, E. Australia

Size: up to 13 cm (5.1 in)

Red List status: Endangered

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Range: Australia

Red List status: Data Deficient

Size: up to 9.4 cm (3.7 in)

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Range: Gulf of Mexico

Size: up to 2.5 cm (1 in)

Red List status: Least Concern

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FAQs

How many species are there for seahorses? ›

Currently, we recognize 46 species of seahorse. Browse the list to learn more about these fabulous fish.

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Do you think that the seahorse is a fish explain your answer? ›

The seahorse is a very unusual animal. Sure, it's a fish, but it's also so un-fish-like. Along with its horse-shaped head, it has eyes like a chameleon that can move independently and a prehensile tail that, similar to a hand, can grip objects.

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How many seahorse offspring will survive? ›

After that, the offspring must fend for themselves. Large litters are necessary because only about 0.5 percent will survive to adulthood. Many, if not all, of the 47 known seahorse species—14 of which were identified only in the 21st century—are in decline worldwide.

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Are there 47 species of seahorses? ›

Seahorse: any of the species of small marine fish in the genus Hippocampus. There are at least 47 different species of seahorses.

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Do seahorses have no gender? ›

Answer and Explanation: Seahorses are not one of those animals who change their sex. The female lays the eggs and the male carries the fertilized eggs on his back. They remain male and female.

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Do seahorses marry? ›

Most wild seahorses (here the thorny seahorse Hippocampus histrix ) are monogamous and some species mate for life. Searching for mates can be difficult and risky since seahorses are poor swimmers, found in low densities and rely on camouflage to hide from predators.

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How fast do seahorses swim? ›

Seahorses are bad swimmers

To move forward, they use the dorsal fin, and the fins on the left and right serve as control. With a maximum speed of 1.5 meters per hour (1.6 yards per hour), the seahorse species Hippocampus Zosterae is the slowest fish in the world.

Is a sea horse a true fish? ›

Seahorses are tiny fishes that are named for the shape of their head, which looks like the head of a tiny horse. There are at least 50 species of seahorses. You'll find seahorses in the world's tropical and temperate coastal waters, swimming upright among seaweed and other plants.

Will seahorses go extinct? ›

The 300 or so species often have limited ranges in coastal regions and freshwater lakes and rivers around the world, and many require specialized habitats, making them susceptible to disturbance. As a result, researchers found, at least 6% of these species and up to 38% are threatened and at some risk of extinction.

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How long is a seahorse pregnant? ›

The female deposits eggs into the male's pouch after a mating dance and pregnancy lasts about 30 days. While inside the pouch, the male supplies nutrients to his developing embryos, before giving birth to up to 1,000 babies.

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How long can a seahorse live? ›

The natural lifespans of seahorses are virtually unknown, with most estimates coming from captive observations. Known lifespans for seahorse species range from about one year in the smallest species to an average of three to five years for the larger species.

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What is the rarest seahorse? ›

The rarest.

The Knysna seahorse is the worlds most elusive and endangered seahorse. This species is only found across three fragmented, local estuaries on the south coast of South Africa. Threatened with extinction and is now totally protected by law.

How many species of sea dragons are there? ›

There are three species of seadragons in the world—leafy (Phycodurus eques), weedy (Phyllopteryx taeniolatus), and the more recently discovered ruby (Phyllopteryx dewysea).

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Are seahorses endangered yes or no? ›

Population data for many seahorse species is sparse, but scientists believe the vast majority are threatened and some populations in rapid decline.

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Do female seahorses exist? ›

A female seahorse lays dozens, sometimes hundreds, of eggs in a pouch on the male seahorse's abdomen. After seahorse moms make their eggs, they pass them over to the males to carry until the young are released.

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All species - Project Seahorse (2024)

FAQs

How many species are there for seahorses? ›

How long can a seahorse live? ›

References