Fish can exhibit territorial behavior, defending their space from rivals.

The manta ray has large, wing-like pectoral fins for gliding through the water.

The manta ray has large, wing-like pectoral fins for gliding through the water.

Fish can exhibit territorial behavior, defending their space from rivals.

Fish can exhibit territorial behavior, defending their space from rivals.

The parrotfish has a beak-like mouth for scraping algae off coral.

The parrotfish has a beak-like mouth for scraping algae off coral.

Fish can have various modes of locomotion, including undulating their bodies and using their fins.

Fish can have various modes of locomotion, including undulating their bodies and using their fins.

The lanternshark can produce light to attract prey or deter predators.

The lanternshark can produce light to attract prey or deter predators.