Two of the reef's masters of disguise carry venomous spines: the scorpionfish, which rests motionless and perfectly camouflaged on the bottom, and the stingray, which lies half-buried in sand. Neither is aggressive. Their spines are purely defensive weapons, used only if the animal is stepped on, grabbed or cornered. Injuries are genuinely rare, and they become almost impossible when you follow the golden rule of never touching the bottom or reaching into places you cannot see.
Know the animals
Scorpionfish blend so well into rock, sponge and coral that divers often swim right past them without noticing. They hold perfectly still, relying on camouflage rather than fleeing, which is exactly why an unwary hand placed on the reef is the usual cause of a sting.
Stingrays are gentle and shy, resting on sandy patches with only their eyes showing. They flee if approached from the front, but a spine near the tail can lash out if they are startled or trodden on from above.
Prevention
Avoiding these stings comes down to a few simple habits:
- Never touch, hold or lean on the bottom
- Do not reach into holes, ledges or crevices you cannot see into
- When crossing sandy shallows, shuffle your fins or send a little water ahead to nudge any resting ray to move off
- Keep good buoyancy so you hover well clear of the seabed
Look with your eyes, not your hands, and both animals will simply be a highlight of your dive.
First aid
These stings can be more painful than a lionfish or urchin, so treat them seriously:
- Immerse the wound in hot (not scalding) water for 30 to 90 minutes to ease pain and break down venom
- Control bleeding and clean the wound thoroughly
- Seek medical care promptly, especially for a stingray wound, which can be deep and may leave fragments
A stingray injury to the torso, or any severe pain, weakness or trouble breathing, is a medical emergency. When in doubt, get help and contact DAN for guidance.
Respect keeps everyone safe
These animals want nothing to do with you, and the same distance that protects you from their spines also protects them from stress and harm. Watching a well-camouflaged scorpionfish reveal itself, or a stingray glide off the sand, is one of the quiet joys of diving here.
Our guides love pointing out this hidden life on the 29 sites around Isla Fuerte. Plan your dives on the interactive dive map and browse more guides to the creatures you will meet.
Important
This is general educational information, not medical advice. Always complete the medical questionnaire honestly, dive within your training and, if in doubt, consult a diving physician or contact DAN (Divers Alert Network). In an emergency in Colombia, the nearest hyperbaric chamber is in Coveñas.
