“…Information on crocodilian physiology, such as blood biochemical intervals, is an important and minimally invasive tool for assessing individual and population health and for veterinary science (Friedrichs et al 2012;Nieto-Claudı ´n et al 2021). However, plasma biochemistry reference intervals for Amazonian crocodilians have been measured in individuals from outside of the Amazon basin and were determined with limited numbers of animals: 12 black caiman (Caixeta et al 2015) and 30 spectacled caiman (Monteiro 2015).…”