Which aquatic organism is known to exhibit cannibalistic behavior?

Crustaceans are known to exhibit cannibalistic behavior, especially in certain species and under specific conditions. This behavior often arises when individuals are competing for resources, particularly during times of stress, such as overcrowding or limited food supply. Juvenile crustaceans may consume their peers as a means of survival and to reduce competition for limited resources, which can be particularly prevalent in aquaculture settings where population density may be high.

In the context of aquaculture, understanding such behaviors is crucial for managing stock health and maximizing yield. Cannibalism can lead to significant losses if not managed appropriately, and it highlights the importance of creating optimal living conditions for these organisms.

While salmon and trout have been observed to exhibit some cannibalistic tendencies, especially in certain growth stages, it is less pronounced than in crustaceans. Catfish, particularly during feeding, may show aggression toward their own species, but it is not categorized as true cannibalism in the same way that is commonly observed among crustaceans. Therefore, crustaceans stand out as a prime example of animals that display this behavior in aquaculture practices.