Funding for this research was provided by:
Israel Science Foundation (312/15, 2236/16, 1239/13)
Received: 8 April 2020
Accepted: 27 July 2020
First Online: 8 August 2020
Ethics approval and consent to participate
: Tentacle samples were obtained from the Underwater Observatory Park, Eilat, Israel under a permit # 2016/41493 from the Israeli Natural Parks Authority.
: Not applicable.
: The authors declare that they have no competing interests.