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Otopharynx ovatus is living in the neighbourhood of the intermediate zones from rocks to sand and they can be found in entire Lake Malawi. These examples were caught in the neighbourhood of Nkanda, in the northern part of the lake. In the lake the males of these species can grow to 18 cm, in the aquarium however they can grow a little taller because of a good feeding. The males can then grow to about 20 cm, females grow to about 16 cm. Otopharynx ovatus is specialised in stealing eggs from cichlids which are dropping off their eggs in their breeding area. They are stealing these eggs (and eat them) before the female is able to take them in her mouth. You can best keep this species with multiple females and other big species in a large tank. In the aquarium they are comfortable with any food. They take everything they get offered, like spirulina pellets, mysis, artemia, cyclops and shrimp-peas mix. 
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