Time lapse of Acropora growth

Even fast-growing corals such as SPS only lay down millimeters of growth per day. The only way to see their growth "in action" is many weeks of photography stitched together in a time-lapse. Peter Kragh has done exactly this and shares his results.

The blue-throated fairy wrasse: a new species

At a cursory glance, we tend to lump similar-looking reef fish into a monolithic species and chalk up differences as variants. But upon closer examination, we are finding sufficient distinction to satisfy the description of a new species. Cirrhilabrus cyanogularis is a case in point.