Good question
I don't think it can be prevented. I have it happen with skipjacks too. When they freeze, water expands, pushing out of their bodies. That's also waht makes them soft. I've heard debates on adding salt, that it will preserve them & actually keep them from a real deep freeze. I think they are still going to freeze at 10 below zero. Wouldn't matter what type of salt, you can put rock or pickeling salt in the water when they are alive to keep their scales on better. You can't use salt with iodine in it on live shad. Maybe they would ingest a little, but I can't imagine it would be enough to make any difference while freezing them. I notice I get alot more bloody water on the second freeze. You can actually use skipjacks about 3 times before they get too soft & mushy. I try to keep them frozen while fishing, I keep them in a cooler & maybe pack it with snow or ice if it's possible. Those never thaw, so that time out doesn't count.
I don't think it can be prevented. I have it happen with skipjacks too. When they freeze, water expands, pushing out of their bodies. That's also waht makes them soft. I've heard debates on adding salt, that it will preserve them & actually keep them from a real deep freeze. I think they are still going to freeze at 10 below zero. Wouldn't matter what type of salt, you can put rock or pickeling salt in the water when they are alive to keep their scales on better. You can't use salt with iodine in it on live shad. Maybe they would ingest a little, but I can't imagine it would be enough to make any difference while freezing them. I notice I get alot more bloody water on the second freeze. You can actually use skipjacks about 3 times before they get too soft & mushy. I try to keep them frozen while fishing, I keep them in a cooler & maybe pack it with snow or ice if it's possible. Those never thaw, so that time out doesn't count.