| Females during the breeding season and the young eat many aquatic invertebrates, but aside from that, wigeons are plant-eaters. |
| If preferred prey species are not present at these depths, lake trout may then resort to feeding on zooplankton and invertebrates. |
| Finally, a variety of tiny worm-like invertebrates adhere to sand grains with viscous secretions that are likely to be gels rather than solid. |
| Otters mostly feed on invertebrates such as urchins, squid, octopus, crabs, abalone and other mollusks. |
| Juvenile Nile perch feed on invertebrates when small then switch to fishes with growth. |
| Such kleptoparasitic behavior is particularly common in birds, but it also occurs in mammals and invertebrates. |
