My plankton trip was like this:

They sent me out by myself with a fisherman who only had a tiny torch that he held in his mouth. His boat had no lights at all. He drove to the middle of the dark ocean and told me to jump in. 2 seconds in the water and the current had already pushed me 15 feet away from the boat. I swam my ass off to get back in the boat and said "fuck that shit". No way he could have found me if the current swept me a few meters away.

Koh Rong Samloem, on the other hand, had awesome plankton right outside my front door.