Scuba divers meet luminous jellyfish on their way to the surface

A luminous jellyfish with long trailing tentacles is a beautiful sight, as long as a scuba diver sees it in time to avoid contact. These scuba divers were finishing a dive in Akumal, Mexico and making their way to the surface when they came across this venomous creature swimming through the water.
Jellyfish have tentacles armed with thousands of nematocysts, or stinging cells. When these cells come into contact with another animal, they fire tiny barbs that inject venom into the animal. This is used as a defense against predators and it is also a means of immobilizing prey that is then consumed.
Jellyfish move through the water by contracting their bell to push water out and propel themselves forward. They are slow, but graceful and beautiful in their rhythmic movement and flowery structure.