Very territorial and observant. They can learn to respond to their owner’s presence and display distinct personalities. Known for recognizing their owners and even accepting food from their hands.

Below are some reasons why some fish species are aggressive: Fighting for food. Some fish will always compete for food. An aggressive fish will fight off other fish that are perceived to be a ...

Life histories of oviparous species dictate high metabolic investment in the process of gonadal development leading to ovulation. In vertebrates, these two distinct processes are controlled by the ...

Astronotus ocellatus; fish meat yield; fish processing; Pellona castelnaeana; Leporinus friderici The Amazon is marked by a flood pulse, characterized by high waters (flood and flood peak) and low ...

Lice infestation can be extremely itchy. Found primarily on donkeys and horses, Bovicola ocellatus are known as “chewing lice” because they feed on dander rather than drawing blood meals. For their ...

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In oscars (Astronotus ocellatus), the appearance of black bars suggests submission rather than dominance. Similarly, in juvenile Atlantic salmon (Salmo salar), the whites of the eyes of ...

On the basis of its classic appearance, the dead snake was identified as Echis ocellatus, also known as the carpet viper, which established the diagnosis of disseminated intravascular coagulation ...

Santhosh Varghese/Shutterstock.com The Astronotus ocellatus is a popular fish species in Venezuela, Peru, Brazil, Ecuador, Colombia, French Guiana, and Suriname in the Amazon River basins. They also ...

"The gathering of A. ocellatus is thus a predictable event that sharks could try to intercept, indicating that predation is a likely driving factor of the seasonal presence of great hammerhead ...