Dr. Tolga Şahin

In a loose and expansive sense, Omnivorous. If the said random species happens to feed on aquatic larval stages of the Families mentioned that normally reside as being part of the periphyton which includes cyanobacteria and all sorts of benthic algal, fungal species growing/accumulating on a substrate, then I guess it can be accurately called Aufwuchs grazers in addition to being planktivorous, or to be more specific facultative algivores.

Regards,

Dr. Abhishek Mukherjee

That situation you raise is very frequent. In my opinion, the easiest way to classify is from the abundance of the trophic resource. In addition, another element to consider is if the animal ingests the animals that appear in the diet accidentally when consuming the algae. I recommend you review the following manuscript:

Article Feeding Diversity in Fishes: Trophic Classification of Fish

It is not easy to fully answer this question.

In the natural environment, almost all herbivores in fact also eat - voluntarily or not - animal material, in the form of eggs and small animals (slugs, snails and, among other insects, aphids), as well as fungi, even significant amounts of soil.

A species is said to be omnivorous - from the Latin omni (all) and vorare (to eat, to swallow) - when its digestive system allows it to absorb food of vegetable and animal origin. This characteristic allows omnivorous species to adopt an “opportunistic” diet, which varies according to the availability of food.

Regards

Thanks Dr. Abhishek Mukherjee Abdiel Jover Capote and Bachir Achour . The animals that I talk about are also classified as algae grazers or periphyton grazers in the related article. Even though there is animal origin food, cyanobacteria (insect larvae) available in digestive systems of given species (look attached table), considering the information ( In the natural environment, almost all herbivores in fact also eat - voluntarily or not - animal material, in the form of eggs and small animals (slugs, snails and, among other insects, aphids), as well as fungi, even significant amounts of soil. ) given by Bachir Achour these fish can't be directly classified as omnivorous. Actually, I am not into that kind of studies. I know 3 major classes of animals in terms of feeding source, which are omnivore, carnivore and herbivore. Hence it seems more accurate to categorize the species or genuses given in the table as herbivore than omnivore.