Dascyllus

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Dascyllus is a genus of fish in the family Pomacentridae. They are usually commensals with corals.[1][2][3]

Taxonomy

Three species complexes have been proposed: the D. aruanus complex (D. aruanus, D. abudafur, D. melanurus),[4][5] the D. trimaculatus complex (D. trimaculatus, D. albisella, D. auripinnis, D. strasburgi), and the D. reticulatus complex (D. reticulatus, D. carneus, D. marginatus, D. flavicaudus). However, only the D. aruanus complex and the D. trimaculatus complex are monophyletic.[6][5] The species of the D. aruanus complex are the most basal in the genus Dascyllus.[5]

Biology

Species of the genus Dascyllus are found in the Indo-West Pacific, and are primarily planktivorous.[5]

The species of the D. trimaculatus complex are the largest in size, growing up to 90–110 mm (SL). All other species are smaller, reaching 50–65 mm (SL), with the exception of D. flavicaudus, which reaches 90 mm (SL).[5]

File:Sharm rocks 04.jpg
Juvenile D. trimaculata hosting Stichodactyla haddoni.

The D. trimaculatus complex is strongly associated with sea anemones as juveniles.[6][7][8] Some and potentially all species in the D. trimaculatus group are gonochoristic, but all other species are protogynous (ie, females can change sex and become males as they grow older or larger). It is likely that protogyny arose once in the common ancestor of the genus Dascyllus, which was then lost in the ancestor of the D. trimaculatus complex. All Dascyllus species are demersal spawners, and in all species, the female lays her eggs in nests prepared by a male, and the eggs are tended by the male until hatching.[5]

Species

Currently, 11 recognized species are placed in this genus:

Species Common name Image
Dascyllus abudafur

(Forsskål, 1775)[9]

Indian Ocean humbug File:20140927 - Dascyllus abudafur - Red Sea (cropped).jpg
Dascyllus albisella

T. N. Gill, 1862

Hawaiian dascyllus File:Hawaiian Dascyllus, North Pacific Ocean, Hilo, HI, US imported from iNaturalist photo 299412722.jpg
Dascyllus aruanus

(Linnaeus, 1758)

Whitetail dascyllus File:Humbug dascyllus (Dascyllus aruanus) (48652156722).jpg
Dascyllus auripinnis

J. E. Randall & H. A. Randall, 2001[10]

Golden domino dascyllus File:Stichodactyla mertensii y Dascyllus auripinnis (cropped).jpg
Dascyllus carneus

J. G. Fischer, 1885

Cloudy dascyllus File:Indian Dascyllus, Anantara Kihavah, house reef, Baa Atoll, Maldives imported from iNaturalist photo 296753507.jpg
Dascyllus flavicaudus

H. A. Randall & G. R. Allen, 1977[2]

Yellowtail dascyllus File:Dascyllus flavicaudus 447936856 (cropped).png
Dascyllus marginatus

(Rüppell, 1829)

Marginate dascyllus File:Red Sea Dascyllus, small gubal island red sea, Egypt imported from iNaturalist photo 30234367.jpg
Dascyllus melanurus

Bleeker, 1854

Blacktail humbug File:Blacktailed dascyllus (Dascyllus melanurus) (48651647008).jpg
Dascyllus reticulatus

(J. Richardon, 1846)

Reticulate dascyllus File:Dascyllus reticulatus 349632235.jpg
Dascyllus strasburgi

Klausewitz, 1960[11]

Strasburg's dascyllus File:Strasburg's dascyllus, Marquesas Islands, French Polynesia imported from iNaturalist photo 301383069 (cropped).jpg
Dascyllus trimaculatus

(Rüppell, 1829)

Threespot dascyllus File:Three-spot Dascyllus, No Name, Ko Tao, Surat Thani, Thailand imported from iNaturalist photo 332636408.jpg

Trivia

Deb, a character in the animated film Finding Nemo, is a damselfish of genus Dascyllus.[12]

References

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  1. ↑ Script error: No such module "Citation/CS1".
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  3. ↑ Youtube <<Advance Marine Aquarium>> Creatures section, Damselfish - Author:Sublanding Fish[2020-06-19]
  4. ↑ Script error: No such module "Citation/CS1".
  5. ↑ a b c d e f Script error: No such module "Citation/CS1".
  6. ↑ a b Script error: No such module "Citation/CS1".
  7. ↑ Script error: No such module "citation/CS1".
  8. ↑ Script error: No such module "Citation/CS1".
  9. ↑ Script error: No such module "Citation/CS1".
  10. ↑ Script error: No such module "Citation/CS1".
  11. ↑ Script error: No such module "Citation/CS1".
  12. ↑ Kirkeby, C. What Kind of Creature Is It? Finding Nemo - Cast of Characters. Template:Webarchive ClassBrain.com May 22, 2004.

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