Obviously my favorite thing underwater in Dominica was Lisa, but
coming in at a particularly close second would be the Electric Rays! We ended up seeing 4 of them during our stay. They're also known as Torpedo Ray and, as it turns out, torpedoes got their name from the rays, not vice versa.
They can emit an electrical shock ranging from 8 to 220 volts and it was extremely hard not to test it out. We were diving with 17 medical professionals (many of whom were emergency medical types) at a conference concentrating on diving related emergencies.
How dangerous could it be?!
Lisa said no.