A fish with level 2 body and level 3 fin (or level 3 body and level 2 fin) is a hybrid specie.These fish needs at least level 2 of Environment Research to survive. A fish with level 2 body and level 2 fin is an uncommon fish.These fish will probably survive at level 1 of Environment Research but their health will go slowly to zero and after a variable amount of time they'll die. A fish with level 1 body and level 2 fin (or level 2 body and level 1 fin) is a hybrid specie.These fish will survive well at any stage in the game. A fish with level 1 body and level 1 fin is the most basic fish you can breed.To know more about the breeding interaction see Breeding. This way there's 9 possible combinations of levels. Breeding means create a fish with a specific Body Type and Fin Type.
Body types and Fin types have each a level ranging from 1 to 3.
