||[Sep. 28th, 2007|11:20 am]
If a fisherman catches a dew fish, which lives in the depts of the ocean, the drop in pressure as he raises the fish to the surface will turn it inside out.
Now I found that tidbit on a couple of trivia pages but I can't seem to find anything to verify if this is true or not. no pictures, etc. Anyone have any more info?
"That's Joy" I think it's cool that she loves singing so much.. even if she's not the best out there. :)
I don't think I have anything to add specifically that other commenters haven't said, but yes, deep water fish hauled up rapidly have gas expansion problems just like scuba divers do...both gas in the vascular systems (decompression sickness or "the bends") and overexpansion injuries from the swim bladder.
I'm not specifically familiar with dew fish, but as someone else said, fish with particularly large swim bladders-- bass are the ones I'm most familiar with--brought up from 2+ ATM of pressure can have so much expansion of their swim bladder that it pushes internal organs out their mouth and gills. I'm not sure if that is what was meant by "inside out," but I could see it being phrased that way.
It's not true that it doesn't hurt the fish. Fish can die from the barotrauma or from "the bends" just like people can. The viscera are made to take a good bit of shifting with the swim bladder, so the bulging itself isn't usually fatal, but it takes a long time (days) for the swim bladder to deflate to where the fish can swim properly. During that time the fish is extremely vulnerable to preditors. The marine ecosystem is pretty unforgiving of sick and weakened critters.
Catch and release deep sea fishers who end up landing a fish with an inflated swim bladder are urged to decompress the bladder with a hollow needle--sort of the same deal as a inkpen barrel chest tube.
Similarly when collecting fish for aquariums from more than 1ATM or so deep, they have to be brought up slowly, then left to hang off the side of the boat the last few meters and raised very slowly--just like a surfacing scuba diver.
This 'll teach you to ask for input on underwater related items! *g*
Awesome! *bookmarking for later persual*
I know so much about this now!! You are SO awesome! Thanks for educating me on this love!!