What characteristic is true of filter feeders like clams?

Filter feeders, such as clams, possess the unique characteristic of extracting food from water. They use specialized structures, like gills, to filter small particles, including plankton and organic matter, from the water as it flows over them. This adaptation allows them to efficiently obtain nutrients and sustenance without actively hunting or foraging for larger prey.

The mechanism of feeding in filter feeders plays a crucial role in aquatic ecosystems because it helps maintain water clarity and provides a food source for various organisms. By siphoning water, they also contribute to nutrient cycling in their habitats. This characteristic distinguishes them from other feeding strategies, making it a defining feature of filter feeders.