Several Hypoptopoma species have been imported from time to time, although none are aquarium shop regulars. That’s a shame, because these are quite neat fish well worth keeping.
Hypoptopoma gulare, for example, is known as the Giant Otocinclus, with an adult size of over 10cm. While many aspects of their care resemble those of typical Otocinclus, they differ in terms of reproduction. While Otocinclus simply scatter their eggs and hope for the best, male Hypoptopoma look after the eggs and fry, just like Ancistrus. This means the males can be quite territorial and aggressive, so while groups of Hypoptopoma work well in large enough tanks, do not overcrowd them.