altruism: feelings and behaviors that show a desire to help others

https://ethicsunwrapped.utexas.edu/glossary/altruism

countershading - a color pattern found in many species of whales and dolphins that helps protect them from predators

https://www.freshnsalty.me/fish-book/counter-shading-camouflage-sharks

dorsal fin: the fin along the midline of the back of most whales, dolphins, and porpoises

https://seathegoldcoast.com.au/australian-whale-species/whale-body-parts-

vector-illustration-labeled-educational-mammal/

breaching: leaping out of the water

https://www.nps.gov/places/humpback-whale.htm

flukes: the flat horizontal lobes that form the tail of all whale and dolphin species

https://seathegoldcoast.com.au/australian-whale-species/whale-body-parts-

vector-illustration-labeled-educational-mammal/

pleats: folds along throat and under the mouth of baleen whales that expand as they gulp in food and water

migration: regular journeys of animals between one region and another

https://farm1.staticflickr.com/432/32236842921_199ddb69fc.jpg

ghost fishing: lost, discarded, or abandoned fishing gear that continues to trap animals and fish

https://www.aquablog.ca/2017/05/ghost-fishing-gear-is-killing-marine-life/