The first class I read this to was a kindergarten class and I just out of the blue asked if they thought the crab did the right thing and to my surprise they all said 'no.' When I asked them why, they said because the crab had lied to the little fish. So I said 'but what about the fish? Did he do the right thing?' And, of course, they said 'no, he's a stealer.' So then they decided it was okay for the crab to have told, even though he said he wouldn't.
It's been really fun to see their gears turning as they weigh Crab's moral dilemma. And so unexpected! I thought we'd be talking about Little Fish's fate - just like Rabbit's in I Want My Hat Back.