You don't even need the red tunic to kill the angler fish before it can attack. God, the red and blue tunics are so unnecessary in LA, the game's already easy.
If I could make one complaint about LA, my favorite game of all time, it would be its boss fights. The last one is pretty cool, but most of them are really easy and just not that well thought out. The face is another one that stands out to me as being a total joke. I think the only decent boss in the game is the eagle's tower boss.