Gold Dust: She's da bigwings. 

HATES ALL SEAWINGS

Snapper: Extra row of teeth, teeth are sharper in general. Keeps accidentally cutting tongue on teeth so he has several scars on tongue.

HATES ALL SEAWINGS

There's more dragons in their troop (Fixfly, Dragonfly Catcher, Sizzle, Slug, and Howler)... but their dead so who cares.

Gosh, both surviving members of the troop hates Seawings! I wonder if that has something to do with the reason the rest of their sibs being dead. It couldn't have been Seawings who killed them! (That was attempted sarcasm btw)