[hoytech]

I'm sure you know, but for the people down-voting you: You often have to kill dogfish when you pull them up because they have poisonous spines on them and you don't want to get pricked while they're thrashing around.

I've never done deep sea fishing, but when fishing with my grandpa he'd cut them up and use them as crab bait, which seemed like a good use for them to me.