Stargazer
These highly camouflaged creatures hide beneath the sand and scuffle along, which means the odds of seeing them before being harmed are rather low. Accidentally stepping on one of these not only stings but slightly electrocutes a person. They do have a venom that can lead to nausea, bleeding, and swelling but the electrocution is a tad scarier- although not deadly.
Stargazer
Coral Reef Snake
There are about 50 different types of sea snake species that are mainly found in the Indian and Pacific Oceans. As members of the cobra family, they are roughly two meters long. Sea snakes are not aggressive and are most likely going to hide from humans. However, just three drops of their venom can kill 8 individuals and they can definitely get through your wetsuit, so keep away and do not risk getting too close as interesting as these creatures can be.
Coral Reef Snake