Venomous Sea Urchin
Black-spiked sea urchins are not vicious or fast, so don’t worry about trying to swim away. However, you should be cautious when swimming alongside them. Numerous divers have grazed their limbs while swimming past sea urchins and sustained serious stings which required medical attention. It did not include peeing on them – sorry if that’s disappointing.
Textile Cone Snail
They are all but what they look like. They’re small. They’re pretty. They are snails, and oh my gosh, are they deadly! The conotoxin (the dangerous stuff) in textile cone snails is so deadly that it can send a person to his grave in a less than 24 hours. So when it comes to this one, rather look and don’t touch.