Procambarus clarkii
Crayfish ("Procambarus clarkii") respond quickly and strongly to high temperatures, however, they show no response to low temperature stimuli, or, when stimulated with capsaicin or isothiocyanate (both are irritants to mammals). Noxious high temperatures are considered to be a potentially ecologically relevant noxious stimulus for crayfish that can be detected by sensory neurons, which may be specialized nociceptors.