Clownfish hatch near the surface and travel deeper to search for a host anemone when they reach their juvenile stage. Within a clownfish community there is a strict hierarchy where juveniles begin at the bottom and have to gradually move upwards by proving their abilities to the rest of the population. During this time they may be victims to agression, and possibly eviction from the anemone by more mature clownfish.

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False Clown Anemonefish

Sharks can detect electrical fields created by other animals using specialized sensory organs. For the hammerheads, these organs are spread over the oddly wide-shaped head to boost the sensitivity.