(CNN) — Pygmy seahorses, about the size of a fingernail, are some of the smallest vertebrates in the world. First discovered in 1969, little was known about the creatures. But in the early 2000s, ...

For the past three weeks, Richard Ross has been spending his mornings next to a small tank in a back room at the Steinhart Aquarium in San Francisco. He leans in close. Not only is the room dark, but ...

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 ...

The most identifiable part of a seahorse is the long snout that gives them their name. But did you know there is a species of seahorse that evolved their snout away? The pygmy seahorse, one of the ...

Because they were a bit gullible, the Ancient Greeks believed a tiny race of humans known as the pygmies did eternal battle with cranes—which, in fairness, can be pretty jerky. Today, “pygmy” lives on ...

Meet the Japan pig, a newfound species of pygmy seahorse discovered in Japan. Only the size of a grain of rice, these colorful creatures inhabit shallow waters and blend in well with the algae-covered ...

In rough, boulder-strewn waters off eastern South Africa, researchers have found a new species: a pygmy seahorse about the size of a grain of rice. The finding shocked them because all seven species ...

Editor’s Note: Call to Earth is a CNN editorial series committed to reporting on the environmental challenges facing our planet, together with the solutions. Rolex’s Perpetual Planet Initiative has ...