David, I agree with you regarding emotions and mammals completely, I just don't like placing human motives/intent in the minds of animals, they certainly are emotionl but they also have both instictive sand learned behavoirs (so do humans). Not an animal behavoiist, just observation of dogs I have owned,
I think the reason the charter captains thought it was the same dolphins was because there is a resident group in the bay there that hang around and they know them and can identify the various individuals, even given them names, human names, evidence indicates in my research that dolphins give themselves names but probably not Fred or Bob etc. I think as I gathered from the conversation that went on for quite a while as the guys chatted when not busy was that the bull shark that took the juvenile was seen also about the area and it was the one they saw killed so I think they assume he was the one that killed the juvenille.
Anyways, thanks for the insigts, very interesting creatures.
N