[Nhcoll-l] Moon jellyfish in liquid

[Callomon,Paul]

We have a number of jellyfish in 70-80% ethanol that float nicely and have retained retain their shape. It seems to depend on the species, but Nettles (Chrysaora) and Cannonball Jellyfish (Stomolophus) at least are OK. If the specimens float or sink a bit too much, you can adjust the specific gravity of the fluid to some extent by adding water or alcohol until they behave.

Paul Callomon
Collection Manager, Malacology and General Invertebrates
________________________________
Academy of Natural Sciences of Drexel University
1900 Benjamin Franklin Parkway, Philadelphia PA 19103-1195, USA
prc44 at drexel.edu<mailto:prc44 at drexel.edu> Tel 215-405-5096 - Fax 215-299-1170

From: Nhcoll-l <nhcoll-l-bounces at mailman.yale.edu> On Behalf Of Joosep Sarapuu
Sent: Thursday, August 17, 2023 8:32 AM
To: NHCOLL-new <nhcoll-l at mailman.yale.edu>
Subject: [Nhcoll-l] Moon jellyfish in liquid


External.
Dear all,

We have an exhibition coming and we would like to show there a moon jellyfish (Aurelia aurita) in a liquid. Do someone has any idea what liquid it should be that keeps the specimen „open“ as in sea water. I have heard that EtOH will make jellyfish to contract. Glycerin and formalin might work in this case? What might be the ratio?


Sincerely,
Joosep Sarapuu
Estonian Museum of Natural History





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