Experienced aquarium owners know they should research different fish species before putting them in their tanks. Some fish are very aggressive and will fight with or eat their tank mates. Meanwhile, ...

These amazing animals are best kept away from other less aggressive fish. From garden ponds filled with Koi Carp to the humble goldfish bowl (although goldfish really need more space to be happy and ...

When fish from different habitats meet, it’s not always love at first swim. New research from Lund University in Sweden in collaboration with North Carolina State University shows that aggressive ...