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Which one of the following is a filter feeder?
(a) Catfish
(b) Octopus
(c) Oyster
(d) Pelican



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A filter feeder is an organism that obtains its food by filtering small particles or organisms from the water. Oysters are known as filter feeders because they draw water into their bodies and filter out plankton and other small food particles from the water. They use their gills to filter and extract nutrients, while the remaining water is expelled.

Catfish, octopus, and pelican are not filter feeders. Catfish are bottom-dwelling scavengers that primarily feed on dead organisms and other organic matter. Octopus is a carnivorous predator that hunts and captures its prey. Pelican is a piscivorous bird that catches fish by diving into the water.


How was this explanation?

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