Posted: Feb 05, 2019 7:52 am
That's the fly-by that spotted the Dolphin @ Jupiter, 30-ish seconds in, looks like it has a dorsal fin though. 
Lifeboat for the rational mind :D
http://www.rationalskepticism.org/
http://www.rationalskepticism.org/viewtopic.php?p=2678768#p2678768