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What do they look like?
Damselfish can be some of the brightest colored fish in the sea. They are generally found in vivid colors of oranges, yellows, reds, and blues. You'll see them in solid colors and in white or black stripes. You'll even see them striped with a variety of their main colors. But all of the damselfish's markings are brilliant. The smaller these fish are, the more amazing their colors are. When these fish grow larger, their colors tend to fade a bit. Damselfish are oval-shaped and have large, beautiful fins. Their fins are often rounded, and their bodies are longer than they are wide. Their dorsal fins typically have about a dozen spines and a dozen sectioned rays. They are covered with reasonable-sized scales across their bodies. The have small mouths and their teeth are tiny and form the shape of a spoon.

How do they behave?
These fish like to live along the bottoms of bodies of water. They like to find a place to hide out to call home. This is generally a nook or cranny along the bottom of the ocean, such as a coral reef. This serves as a place to go when they feel threatened.
They themselves, however, are also quite predatorial. When they see a sea creature they'd like for dinner, they don't waste any time or energy. They attack and bite the fish and let out fairly loud grunts.

What should you know about them?
When these fish spawn, the males in the bunch build nests. They clear rocky areas of vegetation, where the females lay between 50 and 1,000 eggs. Male damselfish protect the nest until they hatch about a week later.