*Update*
Little calf in this trio has been IDed as a young female and this calf will soon be added to Tony Wu's Summary of Humpback Whale Calves in Tonga - 2009. Link below:
Tony Wu's Post & Link to PDF of Humpback Whale Calves 2009: Summary of Humpback Whale Calves
Plus, I've done a new post on the subject:
post includes interesting data, including a photo of the left pectoral fin of the mother, that has a cookie cutter shark hole clear through - right at the tip. This is an unusual ID feature, but it will show up in all subsequent, even topside, photos of the mother's left pectoral. Cookie cutter shark bites are common on humpbacks (too bad!) but, they don't usually cut clear through.
Tony says he is adding more photos of calves to his ID summary and I'll see if I have any new ones! Count is up to 29 definite calf IDs at the moment I think.