Tropheops tropheops 'Mumbo Island' Tropheops sp. 'broadmouth' Mumbo Island
Genus:
Tropheops
Type locality:
Domira Bay, Lake Malawi
Biotope:
Shallow, sediment-rich rocky and intermediate habitats, usually in water
less than 8 m deep.
Geographic distribution:
Widespread in the southernmost part of Lake Malawi, including Boadzulu
Island, Chemwezi Rocks, Harbour Island, Kanchedza Island, Maleri Island,
Monkey Bay, Mphande Island and Mumbo Island.
Typical adult size:
The largest type measured 12.2 cm total length; individuals may
attain larger size in captivity.
Sexual dimorphism:
Females are smaller and duller, showing beige-yellow coloration.
Males develop longer fins, larger anal ocelli and more intense greyish
to greenish-blue coloration with prominent submarginal bands on the
vertical fins.
Diet:
Feeds mainly on filamentous algae and loose aufwuchs scraped from rocks,
with smaller proportions of benthic invertebrates and plankton.
Breeding:
Maternal mouthbrooder. Males establish territories typically at
2–5 m depth on horizontal rock surfaces or slabs and excavate
shallow pits beneath stones as spawning sites.
Aggression:
Males are strongly territorial and exclude intruders, particularly
conspecifics; females are generally non-territorial, although a small
proportion may defend territories.
Special notes:
The original description did not specify a precise collecting
locality beyond “Lake Nyassa”, but later correspondence from the
collector Rodney Wood confirmed that the material originated from
Domira Bay. Considerable taxonomic confusion surrounded the identity
of this species for decades. According to Ad Konings (2022), true
Tropheops tropheops corresponds to the form previously known
as Tropheops sp. ‘broadmouth’, whereas the species earlier
regarded as the true T. tropheops is now referred to as
Tropheops sp. ‘orange chest’.
Photo gallery