when a cetacean lifts its fluke (tail) out of the water and slaps it on the surface of the water

 a fin without a bone or cartilage, located behind the dorsal fin

 Species that live their adult lives in the ocean but move into freshwater streams to reproduce or spawn (e.g., salmon).

 a line encircling Antarctica where cold, northward-flowing Antarctic waters sink beneath the relatively warmer waters of the sub-Antarctic. The convergence is a dynamic boundary, meaning it's precise location may shift, but is generally located between 48º S and 61º S latitude

 Person, institution, or agency who is ultimately responsible for all activities of any individual who is operating under the authority of a permit.

 Marine and estuarine waters north of 60° N. latitude.

 the Spanish word for "arrival"; massive synchronized nesting within the genus Lepidochelys

 Long, flat plates made of fingernail-like material called keratin that hang from a baleen whale's mouth in place of teeth.