As long as the ambient water in fish rearing is fully air-saturated or slightly under-saturated, usually there is no problem. But when ambient temperature moves upwards, the air-saturated water becomes super-saturated with air; the super-saturated water enters the fish and releases air bubbles, causing gas embolism in fish - the trapped air bubbles are often seen in the fin membranes of the fish.
Hi, higher temperatures means less dissolved oxygen in the water and because of the massive energy requirement for gas exchange through the gills means that fish may actually be near suffocation. That means first thing they will reduce activity to need less oxygen. They will not transform feed into bodytissue or stop feeding altogether.... lots of other ramifications, but I doubt that gas embolism plays a role
Best Cornelia
When exposed to warmer waters, lesser dissolved oxygen and higher temperature of the ambient water are the major problems for fish. The fish faces two types of stresses, one of lesser availability of dissolved oxygen and the other of warmer temperature itself - both could turn critical, depending on the severity of exposure. Though gas embolism problem may not be that critical it is a factual situation.
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