Rare, or rarely seen?

Taken by: Alison Perkins
Date taken: Sept. 6, 2014
Description: This nudibranch is small even at maximum size. Crimora cf. multidigitalis has been rarely reported in New Zealand, and only at the Poor Knights Islands, but it's unknown whether it is rare, or just rarely seen.
Camera make: Canon
Camera model: 5D Mark II
Housing manufacturer: Sealux