A. Feeling the environment Every living thing gives off an electric signal.

1. Use of electromagnetic radiation in fishes Erika C Martin C. Predator deterrent When threatened by danger, some electric fishes can give a life-threatening jolt to their enemy. Photo 6. Electric eel. Can deliver a shock of up to 600 volts. Introduction A. Feeling the environment Every living thing gives off an electric signal. Some fishes use this to find prey, avoid predation, or orientation Photo 4. Paddlefish. The paddle fish has electroreceptors on its rostrum (nose) used to find tiny plankton that it eats. 1. How fishes sense electromagnetism Bony fishes Lateral line system (Photo 1) Cartilaginous fishes Ampullae of Lorenzini (Photo 2) D. Capture prey Because all living things give off an electric signal, some species use this to capture prey. Photo 7. Shark. Sharks use a highly specialized sensory system, Ampullae of Lorenzini to capture prey. This is how sharks can close their eyes just before capture – they rely on the electrical signal of the prey. 2. How fishes create electric fields “electric organ” (Photo 3) B. “Talking” to other fish Communication can be used to identify individuals, school, or mate. Photo 5. Schooling fish (left) and an elephant fish (right). These fish use electromagnetism to communicate with each other. 1xgnigar.edublogs.org kaylinq.blogspot.com www.redbubble.com Conclusions Electromagnetism is one of the most important senses for fish survival. References http://people.virginia.edu/~mk3u/mk_lab/electric_fish_E.htm animals.nationalgeographic.com/animals/fish/electric-eel/