All water bodies on earth are aquatic biomes. Aquatic biomes are the largest of all biomes, because water covers approximately three-quarters of the planet, and they're divided into two major categories: marine and fresh... More »

The five major biomes on Earth are aquatic, tundra, forest, desert and grassland. The most basic division of biomes is into aquatic and terrestrial or land. A biome is characterized as areas of the world that have simila... More »

The number of biomes in the world varies depending on how each biome is categorized. Some contend that there are five major types of biomes, while others say that there are nine or even 14 biomes. More »

Sponges filter food particles out of the water by forcing the water through their porous bodies with a self-generated miniature current, which brings particles within reach of the walls of their pores where cells absorb ... More »

Mollusks that live on land move quite slowly on a foot, while mollusks that live in the water send water out of their bodies to propel themselves. Most mollusks have a softer organ protected by a hard shell or are simply... More »

Crayfish move underwater by fluttering small appendages, called swimmerets; but, they can also use their legs to walk on land or on the floor of various bodies of water. Swimmerets are located underneath the tail and can... More »

Marine biology is the scientific study of organisms that live in saltwater or brackish bodies of water. Marine biologists study microscopic sea life, invertebrates, fish, sea birds and sea mammals, as well as reptiles, p... More »

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