UPSC Previous Year Question | Prelims GS | 2021

Which one of the following is a filter feeder?

  1. Catfish
  2. Octopus
  3. Oyster
  4. Pelican

Answer

Correct Answer

Oyster

Explanation

Oysters are bivalve molluscs that filter plankton and organic particles from the water they pump over their gills. Catfish, octopus and pelican capture prey actively and are not filter feeders.

Topics: ecology, environment, feeding relationships, filter feeders