What is more deadly a sea snail or lionfish?

Lionfish are more deadly than sea snails. While both sea snails and lionfish are venomous, lionfish have more potent venom and are more aggressive. A lionfish's venom can cause severe pain, nausea, vomiting, and even paralysis. In some cases, lionfish venom can be fatal. Sea snail venom, on the other hand, is typically less potent and rarely causes serious harm to humans.