There are 40 known seahorse species, which vary in size and appearance. The tiniest is Denise’s pygmy seahorse, which is about the size of a nickel (0.8 inch, or 2 centimeters, long).

Fortunately for the seahorse-curious, they captured the moment in the video above. "We were doing a survey and found a very, very pregnant male that had a tiny tail sticking out of his brood pouch ...

The seahorse may appear ungainly, but it’s actually a sophisticatedly engineered copepod-killing machine. Photo by Florin Dumitrescu via Wikimedia Commons ...

Seahorse Survival On its own, a baby seahorse has a lot to contend with. On average, if the population is stable, only two of the thousands of young that a pair produces will reach maturity.

The rare West African seahorse has been filmed in the wild for possibly the first time. Researchers hope to learn more about the species and help create a more sustainable trade in the animal.

With adults only about an inch tall, the dwarf seahorse is the smallest of the four seahorse species found in U.S. waters. This dainty, curly-tailed fish occurs only in shallow seagrass areas in the ...