The larval stage is a complex phase in aquaculture and living organisms are needed for the survival and development of the fish. The aim of the study was to describe the length of live-feeding suche (Trichomycterus rivalatus Valenciennes, 1846) in Lake Titicaca, Peru. The study was carried out in the prototype culture laboratory of the Fundación Titicaca Perú (FUNTI-PERU), Centro Poblado de Ichu, Puno. 900 pre-larvae of T. rivulatus were used as biological material, distributed in three experimental treatments with three replicates of 100 individuals each. The pre-larvae were obtained after 24 hours post-hatching that belonged to the same spawning. Temperature, dissolved oxygen and pH were measured as physical-chemical parameters of water quality. Survival was evaluated before the consumption of the yolk sac, nauplii of Artemia salina and cladocerans. Total length was measured o...