In Hawaii, we often use the 'shaka' sign as a greeting. Some of the
local fish have picked up on this custom, but lacking fingers and an
opposable thumb, they have compensated by using their tail, as evidenced
by the lower fish in this photo. Believe they are 'working' on the 'high
5' and 'fist bump' as well, but evolution CAN be a tedious process!
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