Tau.
We call them Dog Fish..
What you smell is ammonia..how they process the salt out of their bloodstream..when the fish is first caught and out of the water as soon as it dies it starts the process of ridding its body of the salt..smells like urine.....you think they stink and smell bad.which they do..after two days the process stops and they are then ready to process..keep them cool after you catch them..wash them up after two days.peel them..keep the skin for sand paper..and cook them up..delicious..
The whole trick is to eat them between the time they stop smelling bad from the salt elimination process and the time they start to rot and then they smell bad for sure..just keep them cool and eat them after a couple of days..
Watch the spine barb..
Portee