Well, in Castle. O, they aren't fished up, reluctantly. I can easily avoid Yagudo aggro, but these cutters keep attacking me. How unfortunate it is. At least I know they aggro to sound now.
I was a lvl 21war/10mnk and saw one of these guys on top of a dead guy...Thinking it was just a regualr crab, I walked towards it, when I went to check it, it aggro'd me and hit me for 100 points of damage...I ran like hell. When I got back to Selbina (made it back with 10 hp) I shouted, where the hell did cutters come from?! No one knew and now I'm glad to know the come from fishing. If you see one, run as afst as you can the other way.