A) Delphinus delphis B) Orcinus orca C) Tursiops truncatus D) Inia geoffrensis
A) Fish and crustaceans B) Insects C) Seaweed and algae D) Plankton
A) Nile River B) Amazon River Basin C) Mississippi River D) Yangtze River
A) Tides B) Ocean currents C) River water levels D) Marine salinity
A) Tail flukes like whales B) Flexibility in their neck vertebrae C) Large dorsal fin D) Distinct black stripes
A) Whistles and clicks B) Growls C) Songs D) Roars
A) Long fins B) Sharp eyesight C) Echolocation D) Camouflage
A) They are completely social B) They are always alone C) They are often solitary or in small groups D) They form large pods |