the basic cooking recipes for bait fish lake fish and ocean fish give the exact same boosts. I understand that each has its own set of recipes that improve it further, but the ocean fishes upgraded food is also the SAME as lake fish. not only would it make sense for the basic food to scale with fish type but also the upgraded, otherwise why would i spend lake fish to get ocean fish when they give the same boost??
to make it crystal clear why this is not at all balanced here's a list of tasks for each food:
assume you have a T1 rod and your going for T1 fish.
to catch bait fish you need nothing, cook 2 into plain food
to catch lake fish you need to catch bait fish, process them into to 2 bait per bait fish, catch lake fish, process to filet, cook 1 to 1 plain food
to catch ocean fish you need to catch bait fish, process them to 2 bait per bait fish , catch lake fish, kill sagi birds, process sagi bird at 4 meat per bird, process 10 lake fish and 5 raw meat into a single chum, use chum on ocean fish spot and spot is fishable for 15 mins, use bait to catch ocean fish, catch 1.67 fish per min (these fish are also large cargo), process 1 fish into 3-4 fillets, cook 1 to 1 plain food