I have never heard of such a behaviour in P. pulcher
, but it is reported from tho other Pelvicachromis
species in German magazines:
Seehausen, O. (1988): "Maulbrütende Pelvicachromis?" Die Aquarien- und Terrarienzeischrift (DATZ) 41 (10): 404-405
I have not read the original article, but it is quoted in a cichlid book of H. J. Mayland (1995: "Cichliden"). The species in question is called Pelvicachromis
by Seehausen. It was the female, which took the fry into her mouth.
Hasselmann, M. (2004): "Zeigt Pelvicachromis taeniatus Tendenzen zum Maulbrüten?" DCG-Informationen 35 (3): 58-60
Here is some kind of mouthbrooding behaviour reported in several Nigerian forms P. taeniatus
. In this cases, the male was the "mouthbrooding" fish, and only a part of the fry was taken into the mouth.
A similar behavior has been reported in this forum on the Gabonese "Hemichromis stellifer
" (which is actually a distinct species), see: http://www.cichlidae.info/forum/viewtopic.php?f=10&t=388&sid=f94acf1bfad82be6c5cdb3a00cd553ce
Finally I have own observations to this in two other West/Central African species, namely Tilapia zillii
and the true Hemichromis stellifer
from the Congo. In both species I observed "mouthbrooding" in community tanks some days after the fry started to swim, when their number already was reduced. It was either the male or the female which tooks the fry into mouth, but never both parents simultanously.