Dolphins and seahorses live in water. A dolphin looks like a fish, but it isn’t. A seahorse doesn’t look like a fish. But it is.
How can you tell if an animal is a fish? All fish have a backbone, and all fish have gills. Gills are openings on a fish’s head that are used for breathing.
Most fish are covered in scales. Scales are little round or diamond-shaped pieces of hard skin.
And nearly every fish has fins on its belly, on its back or sides, or as part of its tail.
If it has gills, scales, and fins and lives in the water, it’s a fish!
Picture Credit : Google