I did come across some information about the liquids produced in making canned tuna. They are very good for you, and there are bound to be some of those peptides described below contained in the liquid that is in the can. It could be you will acquire a taste, some cultures love extra fishy tasting foods. I did not drink coffee until I was thirty, I was in my 50s before I acquire the taste for espresso. But a one month car camping trip to France where there was nothing but espresso available and it then became the only way I now like coffee. Tons of tuna in soup does not sound appealing to me but no doubt I would learn to enjoy it if I had it often.
During the preparation of tuna for canning, whole fish are often steamed for a period of hours, and during this process, a watery liquid (called cooking juice) is created that frequently gets discarded as waste by tuna manufacturers. In recent studies, however, scientists have examined the nutrient composition of this cooking juice and determined that small protein fragments—called peptides—are present in the cooking juice and that they possess strong antioxidant properties. The antioxidant properties of these tuna peptides include the ability to protect cell membranes from oxygen-related damage (a process called lipid peroxidation). While the manufacturing of canned tuna is obviously a very different and much more lengthy process than the very short duration cooking methods that you would be using to steam, sear, or broil tuna in your own kitchen, it is still very likely that your at-home cooking methods for preparing fresh tuna will result in creation of some of these same beneficial antioxidant peptides.