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Q: Is a sea horse an invertebrate are vertebrate?
A: That's a good question! Seahorses are interesting critters! They are fish, which are vertebrates.
The sea horse is best known for the remarkable fact that the male seahorse is the one that actually carries the eggs before they hatch. In most other animal species the female of the species if the one to protect the offspring until birth.
As with sea horses, sea dragon males are responsible for childbearing. But instead of a pouch, like sea horses have, male sea dragons have a spongy brood patch on the underside of the tail where females deposit their bright-pink eggs during mating.
Good examples of fish that rely on dorsal and anal fin undulations to move around are the Tube-mouths (Pipe-fishes and Sea horses) however many other fish use them as well, even larger fish such as Esox lucius the Pike.
ORDER: Syngnathiformes (pipefishes and sea horses)
FAMILY: Syngnathidae (pipefishes and sea horses)
GENUS: Hippocampus ...
Fulmar, Arctic Fulmar, Atlantic Fulmar, Pacific Fulmar, Rodgers' Fulmar, Slender-billed Fulmar, Fulmar Petrel, Pacific Fulmar (rodgersi), Noddy, John Down, Molly Hawk, Mallemuck, Mallemugge, Marbleheader, Mollymoke, Oil Bird, Sea Horse, White Hagdon, ...
 See also: Shark, Crustacean, Pipefish, Tuna, Seahorse
  
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