15 Deadliest Beach Creatures. Keep away from any of these 15 deadly creatures when you next visit the beach. 1. Portuguese Man-of-War Jellyfish Not a true jellyfish, the Portuguese Man-of-War is a siphonophore – a colony of organisms living together. Found mainly far out in the sea, it can be seen swarming or floating with thousands of organisms grouped together. Dermochelys coriacea, commonly called leatherback sea turtles, feed on these sea creatures. In fact, it is their favourite food. Source 2. The Marble Cone snail shell looks beautiful but the sea creature inside is deadlier than any other possible beach inhabitant listed here. Source 3. Ocean-going trawlers are where most sea snake bites occur since the snake can be hauled in along with desirable catch. Source 4. The marine snail which inhabits cone shells are found in reefs all around the globe. Source 5. The Dornorn, commonly called the “stonefish” is among the most venomous beach creatures on the planet.
Source 6. Source 7. Source 8. 9. Source 10. Source 11. Source. The Most Futuristic Predictions That Came True in 2012. Neil deGrasse Tyson. SETI Institute. Cseti.org. Scirus - for scientific information.