Animals

A drawing of a lined seahorse

Lined seahorse Facts for Kids

Hippocampus erectus ยท hip-oh-KAM-pus ee-REK-tus

The dad seahorse carries the eggs in a pouch on his belly.

A seahorse is a small fish with a head like a horse. It swims standing up. The dad has a pouch on his belly where the eggs grow.

A seahorse grips seagrass with its curly tail so the current can't sweep it away. It has no teeth and sucks up tiny shrimp whole through its long snout, like a straw. Each of its eyes can look in a different direction at the same time.

Seahorses are bony fish, though they look like no other: they have no scales, and their skin is stretched over rings of bony plates. They swim upright using a tiny fin on the back that flutters very fast, so they are slow and rely on hiding, sometimes changing color to match the seagrass. The mother puts her eggs into the father's belly pouch, and he carries them until the tiny seahorses are ready, then pushes them out. Lined seahorses are listed as vulnerable, mainly because seagrass beds are being lost and many are caught for pets and dried medicine, so people protect their seagrass homes.

How big is a lined seahorse?

โœ‹ a child's hand, 5.9 in15 cm๐ŸŸ Lined seahorse, 4.7 in12 cm tall

Lined seahorse in numbers

Length2.2 to 7.3 in5.5 to 19 cm1height of an upright seahorse
Heightno checked number yet
Weightno checked number yet
Top speedno checked number yet
How long it lives4 years4 years1
What it eatstiny shrimp-like animals and other plankton
Where it livesshallow coastal waters of the western Atlantic Ocean, from Canada to South America
What kindFish
Is it in danger?Needs help (Vulnerable)2

A number we couldnโ€™t find on a page we trust says so, instead of guessing.

Wow!

Compare the lined seahorse

Friends and neighbours

Three questions

What does the lined seahorse eat?

The answer: Tiny sea life. It eats tiny shrimp-like animals and other plankton.

Where does the lined seahorse live?

The answer: Ocean. It lives in shallow coastal waters of the western Atlantic Ocean, from Canada to South America.

Which is longer, the lined seahorse or the cheetah?

The answer: The cheetah. Look at them side by side on the compare stage.

Books about the lined seahorse, free at the library

Ask a grown-up to tap the button: it shows where to borrow a book about the lined seahorse for free.

Where these numbers come from

  1. NOAA Fisheries, Fishery Bulletin (PDF), checked 30 October 2026.
  2. Wikidata, from the IUCN Red List, checked 30 October 2026.
  3. Wikidata, Lined seahorse (Q2578911), checked 30 October 2026.

For grown-ups: Peabody has no ads, not one, and nothing to sell your child. The Kids Pick, an independent kids' directory, rates its games 90/100. See what other free kids' sites load ยท Grown-ups, sign in ยท Already have a profile?