A few ideas me and Bamble tossed around:
Foxes (obvs)
Hyenas
Komodo dragons (we really need some kind of lizard, and these guys are sick)
Sharks (SHARKS)
Otters (need another aquatic tribe with sharks about)
Lynx
Porcupines (why not)
ADD TO THE LIST PLOX










































Sharks abviously like you said, with either whales (Shamu) or Squids as their counterpart.
BEES. We need some insects up in this theme, and bees are awesome. Their opposite would be Ladybugs or Dragonflies.
Regular cats. Just. Cats.
Actual Dragons maybe?