AqualogNEWS100
26
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However,thisnewangel,which Iwill call the
GladstoneAngel,appears tobenohybrid.
Apart from theunusual facialmaskand the
color of the eye-ring, the color pattern is
almost identical to thatof theQueenAngel,
H. ciliaris
. Moreover, just as in the Queen
Angel, thereare twocolor types:onewitha
yellow, and one with a green, body base
color. Such variations are known as “color
phases”.
So what happens now regarding the
GladstoneAngel?
The next step is todeterminewhether this
fish is a hybrid, a color variant, or a new
species. But this task will take time. I hope
very shortly to obtain both live and
preserved specimens of
Holacanthus ciliaris
and theGladstoneAngel from Fortaleza, in
order to provide an answer to this open
question. But I did not want to keep this
splendid new angel from AQUALOGNews
readers for that long.
IsElNiño toblame for itall?
It ispossible that theweatherphenomenon
“El Niño” may be responsible for the
discovery of thenew angelfish.Angelfishes
donotpracticebroodcare,simplyspawning
in theopenwater.
Theeggsand larvaeare left to themercyof
the ocean currents. The Gladstone Angel
may be a truly previously unknown island
form whose eggs and larvae have been
carried to thecoastofBrazil.but this isso far
anunprovenhypothesis.
Aquariumcareofangelfishes
Holacanthus ciliaris
can readily be
maintained in the aquarium. Although this
species, incommonwithother largeangels,
feedsmainly on sponges in thewild, these
creatures veryquicklybecomeaccustomed
to the artificial foods offered them in
captivity. In fact
H. ciliaris
is something of a
glutton. C
AMPBELL
(1981) stresses the
necessity of including at least 50%
greenstuff in the diet of
Holacanthus
species, in order to avoid an otherwise
inevitable loss of vision resulting from the
inability to synthesize vitamin A. As angels
are reluctant to eat such food, a degree of
inventiveness is required.The bestmethod
is to utilize a special gelatin- or agar-based
food.
Literatur:
Allen,G.R.(1979):
Falter-undKaiserfische.Bd.2.Melle
Blosser,Ch.B.(1909):
Reportson theexpedition toBritishGuianaof
the IndianaUniversityand theCarnegieMuseum,1908.Report
No.3.Themarine fishes.Ann.CarnegieMus.6 (1):295-300+pl.
Borodin,N.A.(1930):
Scientific resultsof theYacht„Ara“Expedition
during theYears1926 to1928,while inCommandofWilliamK.
Vanderbilt.Fishes.Bull.VanderbiltMar.Mus.1 (art.2):56-57
Campbell,D.(1981):
Marines:their careandkeeping.Holacanthus–
Apolemichthys:Partone.FreshwaterMar.Aquar.4 (3):22-25,79-80
Feddern,H.A.(1968):
Hybridizationbetween theWesternAtlantic
Angelfishes,Holacanthus isabelitaandH.ciliaris.Bull.Mar.Sci.18:
351-382
Goode,G.B.(1876):
Catalogueof theFishesof theBermudas.Bull.U.S.
Natl.Mus.1 (5):82pp.
Jordan,D.S.&B.W.Evermann (1898):
TheFishesofNorthand
MiddleAmerica.Part II.1679-1687
Nichols,J.T.&L.L.Mowbray (1914):
AnewAngel-fish (Angelichthys
townsendi) fromKeyWest.Bull.Am.Mus.Nat.Hist.33 (art.37):
581-583
Holacanthusciliaris
grows to some45cm in
length and requires a suitably large
aquarium.While juveniles (and this applies
to large angels in general) are extremely
territorial and correspondingly aggressive,
adults are relatively peaceful fishes –
provided, of course, that they are given
sufficient livingspace.
A juvenileyellow-phase
H.ciliaris
in transitional coloration from juvenile toadult.
Photo:Nakano/ArchivA.C.S.
