Is Epifauna and Infauna?

There are two groups of benthic organisms, based on their habitat: epifauna and infauna. Epifauna live attached to a surface and infauna live within bottom sediments.

What's the difference between epifauna and infauna?

Epifauna live attached to a surface and infauna live and burrow in the sediments beneath the surface within a wetland.

Is sea Urchin an epifauna?

Benthos or benthic organisms live on the ocean floor, either on the substrate (epifauna and epiflora) or inside it, buried or burrowing in the sediment (infauna). ... Familiar examples of benthic organisms include macroalgae, seagrasses, corals, barnacles, mussels, sea urchins, and sea stars.