well in my opinion "lipping" isnt the best way to handle any fish that will be released i have read studies and reports in mags showing that it is easy to "hyper extend" the jaws of even bass and that this interfears with there feeding for some time after they are released. if a fish is going to be released the "best" (for the fish atleast) thing to do is to remove the hook quickly while the fish is still in the water this causes the least stress, when a fish is out of water there bodies are not supported and the strain can cause injury, gently cradleing the fish is the next best as it better supports there body sure bass "can and do" survive lipping and when there jaws are flared open when they are lipped the are more submissive but that dosent make it good for the bass just easyer on the fisherman.
with that said you "can" lip trout but there teeth are a little sharper and longer and can take some skin, the only trout (or any fish) i lip are ones im keeping for the grill.
with that said you "can" lip trout but there teeth are a little sharper and longer and can take some skin, the only trout (or any fish) i lip are ones im keeping for the grill.