 It is said to have a “fishy taste” and “ammoniacal odor”.The pH value of the extract seems to be 6.78 and is with that slightly sour.⁠
The toxin of the closely related lesser weever T. vipera has been shown to contain 5-Hydroxy-Triptamine also called Serotonin but in the toxin of "T. draco" this finding could not be confirmed⁠.⁠
The toxicity of the venom was dependent on the way of extraction.The highest toxicity was measured in live fish which were shock frozen and laired in −70 °C-freezers.