On Certain Mental Tests, the Tiny Cleaner Wrasse Outperforms Chimps

appledefault:

bogleech:

Bluestreak wrasses can also remember if the most recent interaction with
one of its hundred-plus clients was positive or negative. If it
previously mistreated a valuable customer —a big fish with lots of
parasites, for example — the wrasse will offer an apology in the form of a more pleasant cleaning with an added fin ‘massage.’

YES

On Certain Mental Tests, the Tiny Cleaner Wrasse Outperforms Chimps