L450 is the newest L number for the Hypancistrus genus which last year added one more known species. Hypancistrus L450 was previously known as Hypancistrus sp.”Santarem” because it was first reported from that vague area of Brazil although it is now known that L450 comes from the tapajos river which is not far from Santarem. The new L450 number was designated in a recent issue of DATZ, the German publication which originally started the L-number naming convention. Early reports of keeping this fish in aquarium pegs it to be a typical Hypancistrus species with preference for meaty foods and well oxygenated, warm water. A few lucky Europeans may have had sporadic access to this species but unfortunately we have yet to see Hypancistrus L450 offered in the U.S. Hopefully the increased usefullness of the new L-number will help collectors and fish slingers better identify this fish so we can see this species for sale, although Brazil is still reticent about shipping out Hypancistrus species.