This study investigated the effects of types of intruders on the level and types of male aggressive acts at different stages of the egg guarding period in domesticated fighting fish (Betta splendens). The degree of aggressiveness was measured at two reproductive phases in response to three types of intruders: male. female and female that had laid eggs. The nest-holding males displayed... https://toyscyclers.shop/product-category/egift-cards/