Sockeye salmon for courtship. If they waste too much energy, they might not be able to spawn. Males must also make the decision whether to invest energy in fighting for a female or for longevity on the spawning grounds. Aggressive behavior displayed by dominant males is predominantly directed towards intruding dominant males. Sometimes sockeye salmon males behave aggressively towards subordinate males. These encounters are short, with the intruding male leaving after one or two aggressive interactions. Spawning females direct their aggression primarily towards intruding females or other spawning females that are close by. However, they may also direct aggression towards intruding or
Fish cosmetic palette for forward, and rear pectoral fins. Two forward arced lines form gill slits, and a yellowish eye is made with inlay. The Louvre dolphin type fish palette is a Naqada I, or II palette. It has simple fish fin grooves on its tail, and its dorsal fin, towards the rear. The palette has an inlaid white eye, (often of shell). Because of its extended length, it contains three suspension holes. The fish palette at the Kunsthistorisches Museum, Vienna, is more ornate than common fish palettes. It is a Bulti-fish type, and notable for a large cosmetic "mixing circle" adorning the