Species image credits

• short-finned-pilot-whale.jpg — Short-finned pilot whale (Globicephala macrorhynchus). NOAA, public domain. Source: Wikimedia Commons.
• indo-pacific-finless-porpoise.jpg — Indo-Pacific finless porpoise (Neophocaena phocaenoides), Miyajima Aquarium. Photo by ori2uru, CC BY 2.0. Source: Wikimedia Commons.