MIDGET CHROMIS (Dwarf
Chromis acares is common at Johnston Atoll south of Hawai'i, and a few larvae probably drift to Hawai'i from time to time and grow to maturity as isolated individuals. Perhaps enough larvae reached the Islands in 2016 that the species began reproducing here. Or perhaps larvae simply arrived here in unusually large numbers early in 2017 and have now grown up. So far in 2017 Midget Chromis have been seen on Oahu (at Kahe Point and Makua), and on Kauai (at Sheraton Caverns and Koloa Landing). If you see any elsewhere, please let me know! There have been no reports yet from Maui, Lanai, or the Big Island.
Update November 2020: The large numbers of Midget Chromis seen off Oahu in 2017 are gone, though a few are still there. A swarm of larvae must have arrived by chance (probably from the Line Islands), grown to adulthood, and perhaps reproduced in small numbers..
below: Blackfin Chromis for comparison
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Text and photos copyright by John P. Hoover