Coral trout show cross-species collaboration with moray eels.

“Now it seems the fish are surprisingly picky about when they ask for that help – and which eels to approach. The trout show a level of discrimination in when to collaborate, and with whom, that was thought to be unique to the likes of humans and chimpanzees.”

http://www.newscientist.com/article/dn26173-zoologger-fish-that-picks-its-work-partners-wisely.html#.VA8Zddkayc2

—
Yours sincerely,

Dr Richmond Loh
DipProjMgt, BSc, BVMS, MPhil (Pathology) Murdoch, MANZCVS (Aquatics& Pathobiology), CertAqV, CMAVA, NATA Signatory.
THE FISH VET, Perth, Western Australia.
Veterinary Medicine for fish.
W: http://www.thefishvet.com.au
E: thefishvet
P: +61 (0)421 822 383