Fish in the sea live in water, have fins, and breathe through gills. While most fish are shaped differently and come in various colors, they share these key traits. The document discusses clownfish specifically and how they have a unique relationship with sea anemones where they are protected from predators despite the anemones' stinging tentacles.

1. Fish in the sea

2. What Is a Fish? Fishes come in an amazing variety of shapes and colors, but they all have three important things in common: All fishes live in water, have fins, and use gills to get oxygen from the water. We have also included a few sea creatures -- some jellyfish and octopods -- in this category.

5. HABITS Clownfish belong to a group of small, brightly colored fish called damselfish. These inshore reef dwellers have developed a curious and potentially deadly relationship with the sea anemone.

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8. By Levi Armstrong