Fish act aggressively towards their mirror image suggesting that they consider it another individual, whereas in some mammals behavioural response to mirrors may be an evidence of self-recognition. Since fish cannot self-recognize, we asked whether they could distinguish between fighting a mirror image and fighting a real fish. We compared molecular, physiological and behavioural responses in e...

In the present study, the importance of temperature, individual size and habitat arrangement on the bubble nest construction of Siamese fighting fish (Betta splendens Regan, 1910) was investigated. 75 males and 15 females of B. splendens were used for the study. Ten aquariums (33 × 100 × 60 cm) were used and were divided into two sides by a glass layer. Aquariums were aerated and heated by aqua...