Then the disciple whom Jesus loved said to Peter, “It is the Lord!” As soon as Simon Peter heard him say, “It is the Lord,” he wrapped his outer garment around him (for he had taken it off) and jumped into the water. The other disciples followed in the boat, towing the net full of fish, for they were not far from shore, about a hundred yards. When they landed, they saw a fire of burning coals there with fish on it, and some bread. Jesus said to them, “Bring some of the fish you have just caught.” Simon Peter climbed aboard and dragged the net ashore. It was full of large fish, 153, but even with so many the net was not torn. Jesus said to them, “Come and have breakfast.” None of the disciples dared ask him, “Who are you?” They knew it was the Lord. Jesus came, took the bread and gave it to them, and did the same with the fish. John 21:7-13

No where does it say in the Bible that Jesus specifically liked tuna, but it does says that He eats fish. In Genesis God declares everything He made good. He certainly made tuna to taste good to (most) humans.

If the real question here is “Does God eat food,” then the answer is YES for Jesus who is in a glorified/resurrected human body and ate fish and NO to God the Father because He is spirit and has no digestive tract.