Brazilian Seahorse
Hippocampus reidi
Also known as: Long-snout Seahorse, Longsnout Seahorse, Slender Sea Horse
A slow-moving, sociable seahorse with a famously elongated snout built for precision hunting.

About
The longsnout seahorse (Hippocampus reidi) is one of the larger seahorse species found in the Western Atlantic, ranging from the coastal waters of North Carolina down through the Caribbean and all the way to Brazil. It favors soft-bottom habitats where gorgonians and seagrasses provide anchor points. This species spends much of its time gripping vegetation with its prehensile tail rather than swimming freely, though individuals do occasionally turn up in open water or drifting mats of Sargassum. The elongated snout that gives this fish its common name isn't just for show; it functions like a precision pipette, letting the seahorse snipe small crustaceans and other tiny prey with a rapid vacuum strike. Like all seahorses, the male handles the pregnancy, brooding fertilized eggs in a pouch beneath his tail until the young are ready to emerge. In the wild, pairs are monogamous and home-ranging, meaning they share a loosely defined area without actively defending it. In an aquarium, the longsnout seahorse settles in reasonably well given proper care. A dedicated species setup with plenty of holdfasts, consistent live or frozen enriched foods, and tankmates that won't outcompete it at feeding time will keep this gentle fish content for years.
Similar species
Other fish you might consider
Good tank mates
Species that tend to coexist peacefully with Brazilian Seahorse
From the same region
Share the same natural habitat. Great for a biotope-themed tank
Frequently asked questions
- How big does the Brazilian Seahorse get?
- The Brazilian Seahorse reaches about 6–8" as an adult.
- What size tank does the Brazilian Seahorse need?
- A minimum of 30 gallons is recommended for the Brazilian Seahorse.
- What water parameters does the Brazilian Seahorse need?
- The Brazilian Seahorse does best with a temperature of 72–78°F, a pH of 8–8.4.
- Is the Brazilian Seahorse aggressive?
- The Brazilian Seahorse is generally peaceful and suits a community tank with similarly calm tankmates.
- What does the Brazilian Seahorse eat?
- The Brazilian Seahorse is a carnivore. It needs a meaty, protein-rich diet of frozen or live foods.
- How long does the Brazilian Seahorse live?
- With good care, the Brazilian Seahorse typically lives 3-5 years.
- Is the Brazilian Seahorse reef safe?
- The Brazilian Seahorse is generally considered reef safe.