Which one of the following is a filter feeder?
- ACatfish
- BOctopus
- COysterCorrect
- DPelican
Explanation
An oyster is a classic example of a filter feeder. Filter feeders are a sub-group of suspension feeders that feed by straining suspended food particles from water, typically by passing the water over a filtering structure. Oysters draw water over their gills, which act as a filter, trapping food particles like plankton and other microscopic organisms. Catfish are bottom feeders, octopuses are predators, and pelicans are fish-eating birds, none of which are primarily filter feeders.
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