Aquatic animals, such as clams or burrowing worms, that live beneath the surface of a sea or lake floor.
The animals burrowing into marine or freshwater sediment.
Benthic animals that live in the substrate of a body of water, especially in a soft sea bottom. Infauna usually construct tubes or burrows and are commonly found in deeper and subtidal waters. Clams, tubeworms, and burrowing crabs are infaunal animals.
Origin of infauna
- in– fauna
From American Heritage Dictionary of the English Language, 5th Edition