Dusky Damselfish

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Dusky Damselfish
Dominica (Scott’s Head Dropoff) – 1/16/2017

Dusky Damsels and Longfin Damsels look so much alike, it is really hard to distinguish the two.  These are the 3 major helpful distinguishing features:

  1. The Longfin Damselfish has a dorsel fin that extends nearly to the end of its tail, whereas the Dusky only extends to the base of the tail (the caudal peduncal).
  2. The Longfin Damselfish has a bright blue edge on its anal fin, whereas the Dusky is missing this feature.
  3. Dusky Damsels tends to hang out at shallower depths.
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