“As
a fish approaches, the shrimp waves its antennae back and
forth to
attract attention. If interested, the fish swims
over and allows the shrimp to climb aboard. The
shrimp moves rapidly over the fish,
picking off parasites, investigating
irregularities, and cleaning injured areas. As the fish lies quietly, as if
in a state of suspended animation,
the shrimp is even allowed to make minor
incisions to extradite
subcutaneous parasites.”