Oh great, my buddy probably had to deal with that. He works in one of the AC&R shops in engineering.
He needs to cobble together some kind of ray gun in the engineering shop. "Die jellyfish, die!!!"
AC&R is one of the best jobs to have in A-gang. Been there done that :>} They use sea water for the chiller condensers and refrigeration units. It's about hour job on each unit if all goes right. You spend more time cutting the new gasket and cleaning the old one off than you do cleaning the strainer. We never had the misfortune of something like that hitting all at once thankfully. But IIRC it was a once every 3 month job anyway. I've been off my ship 25 years and if it was still around I could go through and operate all the A/C units and remember each ones quirk.
Tell him this and he'll get a good laugh. If the Chill Water Loop is loosing water and you can't find out where just dump two cans of sea marker in the loop. We did it in port and every discharge on the ship I think poured green. Base Commander wasn't too happy LOL.