There are stingrays that are poisonous, usually found in the shallow coastal waters of temperate seas. Most of the time they remain inactive, partially buried in sand, only moving with the rolling of the waves. One of the deaths caused by a poisonous stingray was that of the world-renowned crocodile hunter, Steev Irwin's
Many times when buried under sand they can not be detected easily, besides that thanks to their cores they are able to camouflage themselves.
It should be noted that not all are poisonous, and as long as you have respect and keep distance you can interact with them.
