One serving of cuttlefish contains 79 calories.
The cuttlefish is pretty low in calories when it comes to meat but I've heard that cuttlefish are poisonous to humans to eat and should not be eaten.
Some people eat cuttlefish without any issue but it's a personal choice but be aware that you could get sick or even die when eating cuttlefish.
So just take that into account and I would not want to eat it myself.
Other fish are good but cuttlefish I would advise staying away from.