Make your own descending device As the summer continues, help your deep-water reef fish like snapper and grouper make it back down to the bottom by using a descending device. These tools are now required when fishing for reef fish in Atlantic federal waters off Florida, but are a good idea no matter which coast you fish on. Only use these tools when fish show signs of barotrauma and can’t make it back to the bottom on their own. Speed is key to helping fish survive, so get them back in the water