* Abalone: A type of large sea snail with a beautiful, iridescent shell.
* Angelfish: Colorful, tropical fish known for their distinctive body shape.
* Anemone: A colorful, stinging creature that looks like a flower but is actually an animal.
* Anchovy: Small, silvery fish that are a common food source for larger fish.
* Antarctic krill: Small, shrimp-like crustaceans that are crucial to the Antarctic ecosystem.
* Atlantic Sailfish: Large, fast-swimming fish with a long, sail-like fin.
* Atoll: A ring-shaped coral reef that encloses a lagoon.
Let me know if you'd like to explore other ocean animals starting with a different letter!