May cause profound effects on the cardiovascular system of anesthetized rats (at 25 ug/kg), since the fraction containing this toxin and CfTX-2 produces an initial increase in mean arterial pressure, followed by cardiovascular collapse in all animals within 1 minute of injection (PubMed:24403082). To note, the same fraction does not induce significant change in heart rate (PubMed:24403082). Has weak hemolytic activity (PubMed:24403082). Is lethal to crayfish (By similarity). Causes cutaneous inflammation in humans (By similarity). May act as a pore-forming toxin, disrupting normal transmembrane ion concentration gradients in susceptible cells (By similarity). Oligomer. Forms a membrane channel in the prey. Nematocytes. Contains disulfide bonds. The fraction containing this toxin and CfTX-2 does not cross-react with CfTX-A and CfTX-B antibodies. Found after both pressure and chemical disruption of nematocysts. Belongs to the jellyfish toxin family. Type I subfamily.