I've noticed that gulp fish drop bottles of water / polluted water if they contained any when they die. I don't think they should do this as this can mess with systems that are automated for example to collect ice created from cool slush vents.
Steps to Reproduce
Spawn some gulp fish in a cold polluted water tank (18 degrees F or cooler) and let them run their life span til death. You should end up now and then with bottles of water and polluted water sitting at the bottom of the tank.
This issue has not been confirmed by a developer yet.