Seahorses by species

Project Seahorse and the International Union for Conservation of Nature (IUCN) currently recognize 41 species of seahorse. Found mainly in coastal regions all over the world, seahorses come in many different shapes and sizes, from the big-bellied seahorse, which can reach up to 35 cm in length, to pygmy species less than 2 cm long.

Twelve seahorse species are currently listed as threatened on the IUCN Red List of Threatened Species. Many more are considered data-deficient, because we do not yet have enough information about them. You can help by adding your seahorse observations and by providing species IDs for other observations.

Hippocampus abdominalis

Bigbelly SeahorseSpecies profileObservations (69)Red List assessment

Hippocampus algiricus

West African SeahorseSpecies profileObservations (7)Red List assessment

Hippocampus angustus

Western Spiny SeahorseSpecies profileObservations (2)Red List assessment

Hippocampus barbouri

Barbour's SeahorseSpecies profileObservations (8)Red List assessment

Hippocampus bargibanti

Pygmy SeahorseSpecies profileObservations (197)Red List assessment

Hippocampus biocellatus

False-eye SeahorseSpecies profileObservations (2)Red List assessment

Hippocampus borboniensis

RĂ©union SeahorseSpecies profileObservations (11)Red List assessment

Hippocampus breviceps

Shorthead SeahorseSpecies profileObservations (42)Red List assessment

Hippocampus camelopardalis

Giraffe SeahorseSpecies profileObservations (4)Red List assessment

Hippocampus capensis

Knysna SeahorseSpecies profileObservations (6)Red List assessment

Hippocampus colemani

Coleman's Pygmy SeahorseSpecies profileObservations (1)Red List assessment

Hippocampus comes

Tiger Tail SeahorseSpecies profileObservations (160)Red List assessment

Hippocampus coronatus

Crowned SeahorseSpecies profileObservations (6)Red List assessment

Hippocampus debelius

Softcoral SeahorseSpecies profileObservations (1)Red List assessment

Hippocampus denise

Denise's Pygmy SeahorseSpecies profileObservations (67)Red List assessment

Hippocampus erectus

Northern SeahorseSpecies profileObservations (53)Red List assessment

Hippocampus fisheri

Fisher's SeahorseSpecies profileObservations (0)Red List assessment

Hippocampus guttulatus

Long-snouted SeahorseSpecies profileObservations (91)Red List assessment

Hippocampus hippocampus

Short-snouted SeahorseSpecies profileObservations (80)Red List assessment

Hippocampus jayakari

Jayakar's SeahorseSpecies profileObservations (12)Red List assessment

Hippocampus jugumus

Collared SeahorseSpecies profileObservations (0)Red List assessment

Hippocampus kelloggi

Great SeahorseSpecies profileObservations (12)Red List assessment

Hippocampus lichtensteinii

Lichtenstein's SeahorseSpecies profileObservations (0)Red List assessment

Hippocampus minotaur

Bullneck SeahorseSpecies profileObservations (0)Red List assessment

Hippocampus mohnikei

Japanese SeahorseSpecies profileObservations (17)Red List assessment

Hippocampus montebelloensis

Monte Bello SeahorseSpecies profileObservations (0)Red List assessment

Hippocampus patagonicus

Hippocampus patagonicusSpecies profileObservations (3)Red List assessment

Hippocampus pontohi

Weedy Pygmy SeahorseSpecies profileObservations (38)Red List assessment

Hippocampus procerus

Highcrown SeahorseSpecies profileObservations (1)Red List assessment

Hippocampus pusillus

Dwarf Thorny SeahorseSpecies profileObservations (1)Red List assessment

Hippocampus reidi

Longsnout SeahorseSpecies profileObservations (296)Red List assessment

Hippocampus satomiae

Hippocampus satomiaeSpecies profileObservations (1)Red List assessment

Hippocampus severnsi

Hippocampus severnsiSpecies profileObservations (13)Red List assessment

Hippocampus sindonis

Shiho's SeahorseSpecies profileObservations (11)Red List assessment

Hippocampus spinosissimus

Queensland SeahorseSpecies profileObservations (91)Red List assessment

Hippocampus subelongatus

West Australian SeahorseSpecies profileObservations (18)Red List assessment

Hippocampus trimaculatus

Three-spot SeahorseSpecies profileObservations (16)Red List assessment

Hippocampus waleananus

Hippocampus waleananusSpecies profileObservations (0)Red List assessment

Hippocampus whitei

White's SeahorseSpecies profileObservations (16)Red List assessment

Hippocampus zosterae

Dwarf SeahorseSpecies profileObservations (19)Red List assessment

Kyonemichthys rumengani

Kyonemichthys rumenganiSpecies profileObservations (1)Red List assessment

Phyllopteryx taeniolatus

Common SeadragonSpecies profileObservations (4)Red List assessment