Archive image from page 98 of Dangerous marine animals (1959). Dangerous marine animals dangerousmarinea00hals Year: 1959 MARINE ANIMALS THAT STING 79 COMPARISON OF THE VENOM ORGANS OF PTEROIS, SCORPAENA, AND SYNANCEJA Structure Pterois Scorpaena Synanceja Fin spines Elongate, slender Moderately long, heavy Short, stout Integumentary sheath Thin Moderately thick Very thick Venom glands Small-sized, well- developed Moderate-sized, very well-de- veloped Very large, highly developed Venom duct Not evident Not evident Well-developed VENOM GLAND TERMINATION OF VENOM GLAND INTEGUMENTARY, SHEATH

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