Definitions

1. noun

the animals that live on or above the surface of the seafloor, such as those attached to rocks, coral reefs, or other underwater structures.

“The epifauna of the coral reef were diverse and colorful, with many species of fish, crustaceans, and mollusks.”

2. noun

in the context of marine sediments, the organisms that live on or above the surface of the sediment, such as those attached to sand, mud, or other particles.

“The epifauna of the marine sediment played an important role in the ecosystem, serving as a food source for many other animals.”