I found this on the state F@G website. Very interesting to say the least. Sounds like there is not enough food for the halibut that are out there.
ADF&G has received several reports of "mushy" halibut, where the flesh is very soft or flabby, sometimes with pockets of jelly-like tissue. Anglers report that the fish are mushy after being cooked as well. ADF&G has not yet tested these fish, but reports are similar to incidences in 1998 and 2005, which the ADF&G pathology lab diagnosed as a nutritional myopathy. The incidence of flabby or jelly-like flesh can be high for anglers fishing in certain locales, so if you catch a fish that feels flabby, release it immediately unharmed. You might consider moving to a different area to avoid these fish.