Name the type of hazardous marine life divers should be cautious of.

Jellyfish, lionfish, and stonefish are considered hazardous marine life that divers should be particularly cautious of due to their venomous capabilities and potential for causing harm.

Jellyfish have tentacles equipped with nematocysts that can deliver painful stings, which varies in severity depending on the species. Some jellyfish, like the box jellyfish, possess venom that can be life-threatening. Lionfish are known for their striking appearance but are also equipped with venomous spines that can cause intense pain and swelling. Stonefish, regarded as one of the most venomous fish in the world, can deliver a sting that may result in severe pain, paralysis, and in extreme cases, death if not promptly treated.

Thus, being aware of these specific types of marine life is crucial for divers to avoid injuries and handle encounters safely.