Source: Wikipedia
| Pycnochromis hanui | |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Blenniiformes |
| Family: | Pomacentridae |
| Genus: | Pycnochromis |
| Species: | P. hanui
|
| Binomial name | |
| Pycnochromis hanui (Randall & Swerdloff, 1973)
| |
| Synonyms[2] | |
|
Chromis hanui | |
Pycnochromis hanui, commonly known as chocolate-dip chromis, is a species of damselfish endemic to Hawaii.[3]
Description and biology
[edit]Pycnochromis hanui was formerly known as Chromis hanui.[2] They reach a max length of 6.0 cm,[4] and have an oval shaped body with a pointed nose and forked tail.[2] They have a total of 12 dorsal spines, 13 dorsal soft rays, 2 anal spines, and 13-14 anal soft rays.[4] The common name matches its appearance. The front half of its body looks as if it has been dipped in chocolate.[2] They are brown with a black spot on the pectoral fin base.[4] The caudal fin, caudal peduncle and adjacent part of the dorsal and anal fins are white.[4] Nuptial males have a yellowish-brown zone in the center and bright eyes.[2] Males guard and remove waste from the eggs, keeping them healthy.[4] Pycnochromis hanui are planktivore.[5]
Distribution and habitat
[edit]Pycnochromis hanui is endemic to Hawaii.[2] Adult Chocolate-dip Chromis live in inshore and offshore reefs.[4] They are found in mass groups above corals. They live in scuba depths of 6-50 meters, and live in 28°N - 17°N temperatures.[4]
References
[edit]- ^ Allen, G.R. (2022). "Pycnochromis hanui". IUCN Red List of Threatened Species. 2022: e.T188611A1902011. doi:10.2305/IUCN.UK.2022-2.RLTS.T188611A1902011.en. Retrieved 1 April 2025.
- ^ a b c d e f Stender, Keoki, and Yuko Stender. “Pycnochromis Hanui.” Chocolate-Dip Chromis, Pycnochromis Hanui, 2021, www.marinelifephotography.com/fishes/damselfishes/chromis-hanui.htm.
- ^ "WoRMS - World Register of Marine Species - Pycnochromis hanui (Randall & Swerdloff, 1973)". www.marinespecies.org. Retrieved 2023-06-06.
- ^ a b c d e f g Randall, John E (August 1, 2021). "Pycnochromis hanui (Randall & Swerdloff, 1973) Chocolate-dip Chromis". Pycnochromis hanui (Randall & Swerdloff, 1973) Chocolate-dip Chromis. Retrieved August 1, 2021.
- ^ Hawaii coral reef network (January 25, 2005). "Fishes of Hawaii". Hawaii Coral Reef Network. Retrieved November 21, 2023.