Received: 17 November 2020
Accepted: 12 January 2021
First Online: 17 February 2021
Ethics approval and consent to participate
: No new animal data were collected or curated for this paper. IACUC protocols for blue whales are included in [CitationRef removed] and for elephants in [CitationRef removed].
: Not applicable.
: The authors declare that they have no competing interests.