What is the definition of an Aquatic Biome?

The following is taken from the ?Ecosystems, Biomes, and Watersheds: Definitions and Use? Congressional Research Service Report for Congress by M. Lynne Corn, Specialist in Natural Resources Policy, Environment and Natural Resources Policy Division, July 14, 1993. 93-655 ENR

A biome can be defined as a "major regional community of plants and animals with similar life forms and environmental conditions. It is the largest geographical biotic unit, and is named after the dominant type of life form, such as tropical rain forest, grassland, or coral reef."

 The dominant life forms are usually conspicuous plants, or plant-like species such as corals. A single biome can be widely scattered about the planet. Due to similar pressures of natural selection, species in different parts of a biome may converge in their appearance and behaviors, even when they do not share the same ancestors