Аннотация:It is proposed that the use of methyl blue will improve routine stereomicroscope identification work, as it allows much greater
contrast between important features. We obtain good results with animals with an external epidermis (Polychaeta, Echinodermata).
Animals with an exoskeleton (Crustacea, Bivalvia) give weak or absent contrast effect. Toxicity of methyl blue for humans even it
has been swallowed is absent.