Enclosure and maintenance
Adults reach about 20–22 cm. Xenesthis immanis is a terrestrial species, so the enclosure should prioritise usable floor space, a snug ground-level retreat and enough substrate to keep fall height low.
With Xenesthis immanis, routine care should not involve handling. Arrange the water dish, retreat and door so feeding and cleaning can be done without repeatedly disturbing the spider.
Growth, feeding and moulting
Growth is fast. Feed to the spider's size, appetite and abdomen rather than forcing a rigid weekly schedule; the routine will change as Xenesthis immanis grows.
If Xenesthis immanis refuses food and shows premoult signs, remove live prey, keep water available and leave it alone. There is no need to make a spider in normal premoult eat.
Lifespan and buying one
Colombian Lesserblack Tarantula females can live 12–15+ years; males live roughly 3–5 years. An unsexed youngster can therefore become either a relatively short or a much longer commitment.
A sexed Colombian Lesserblack Tarantula label is only as useful as the evidence behind it. Ask how the sex was confirmed and get a measured size rather than relying on juvenile or sub-adult.