Not sure what these are.. They were free

Looks like ricordia yuma. Nice free coral.

OH NO! get them out asap. they are harmful electro pulsing corals that can zap ur entire tank with a powerful electrical charge. jk, they are yumas! nice!!!

Then I guess i will have to connect them to a grounding Probe and hope i don't get shocked in the process....lol Thanks for the info. also is there any special care needed to take care of them.