Largest living reptile — males up to 7 m and 1,000 kg. Olive-grey. Strongest bite force ever measured (3,700 psi). The world's most prolific man-eater.

Kills ~1,000 people per year worldwide — more than sharks, lions, and tigers combined. Active hunter of humans. About 1-2 deaths/year in Australia, dozens in Indonesia/PNG/Solomon Islands.

Tropical coasts and rivers from India through SE Asia, northern Australia, PNG, Solomon Islands, Vanuatu, Fiji (rarely).

Ambush hunter — explodes from water to grab prey at water's edge. Death roll drowns large prey. Travels 1,000+ km along coasts via ocean currents.

Up to 60 cm. Mottled brown — perfect camouflage as a rock or piece of coral. 13 dorsal spines deliver deadly venom on contact. Asian counterpart of the Australian reef stonefish.

Excruciating pain often described as the worst known. Without antivenom, large stings can be fatal in hours from cardiovascular collapse. Several deaths/year across Asia.

Estuaries, mangroves, shallow tidal pools of India, Bangladesh, Myanmar, Thailand, Vietnam, China, Indonesia, Philippines.

Lies motionless half-buried in sand/mud. Hunters often step on them while wading or fishing barefoot.

Beautiful patterned shell 10-15 cm long. The most venomous of all cone snails. Hunts fish with a venomous harpoon-like tooth fired from a proboscis.

Conotoxin causes total paralysis with no antidote — mortality ~30%. Victims describe being conscious but unable to move or breathe. Patients survived by being put on ventilators until toxin cleared.

Coral reefs and sandy areas of tropical Indo-Pacific — Australia, PNG, Indonesia, Philippines, all Pacific islands.

Slow-moving but hunts fish (!) by harpooning them with a tooth shot at high speed. Tourists picking up the pretty shell get stung.

5-7 mm mosquito. The primary vector of malaria in urban South Asia. As a species group, mosquitoes have killed more humans than any other animal in history.

Malaria kills 600,000+ people/year globally — most in tropical Asia and Africa. Dengue, lymphatic filariasis, Japanese encephalitis also transmitted. India: 200,000+ malaria cases/year.

Urban and peri-urban areas of India, Pakistan, Bangladesh, Myanmar, Thailand, Indonesia, parts of Middle East, Horn of Africa.

Bites at dusk and dawn. Breeds in wells, water storage containers, construction sites. Now spreading to African cities.

Distinctive black mosquito with white lyre-shaped markings on thorax. Primary vector of dengue, yellow fever, Zika, chikungunya in tropical Asia.

Dengue: 4 billion at risk globally, 40,000 deaths/year, mostly in Asia. 2024 outbreak in Bangladesh killed 1,705. Bangkok, Manila, Karachi seasonal epidemics.

Urban areas of all tropical and subtropical Asia. Domestic breeder — flowerpots, water tanks, gutters, AC drips.

Daytime biter (unlike most mosquitoes). Bites multiple people per blood meal — spreads disease efficiently.

Cube-shaped bell up to 30 cm with up to 60 tentacles trailing 3 m. Pale blue, almost invisible in water. Active swimmer (most jellyfish drift).

Most venomous marine animal — sting causes cardiac arrest within 2-5 minutes. ~80 deaths recorded in Australia, ~40 per year in Philippines. Vinegar must be applied immediately.

Coastal waters of northern Australia (October-May 'stinger season'), Indonesia, Papua New Guinea, Philippines, Thailand, Vietnam.

Has 24 eyes — can see and navigate. Hunts shrimp in shallow water near beaches. Lives only ~3 months but can sting even when washed up dead.

Tiny — only 12-20 cm tip-to-tip. Yellow-brown with bright blue rings that pulse vividly when threatened. Looks adorable. Is lethal.

Tetrodotoxin (same as pufferfish) — 1,000x more potent than cyanide. One bite paralyzes adults; victim conscious but can't breathe. No antivenom. Treatment: artificial respiration for 24+ hours until toxin clears.

Tide pools and coral reefs of Australia, Papua New Guinea, Indonesia, Philippines, Solomon Islands.

Hides in shells, bottles, debris. Bite is painless — victim may not realize until paralysis begins minutes later. Picked up by tourists curious about color.

Black above, bright yellow below, paddle-shaped tail. Up to 1 m. The most widespread snake in the world — Indo-Pacific from Africa to Americas.

Highly potent neurotoxin — 10x more toxic than cobra. But docile and rarely bites swimmers. Most bites: fishermen entangled in nets.

Open ocean throughout Indo-Pacific — Australia, all Oceania islands, Indonesia, Philippines, India, even Pacific coast of Mexico/Central America.

Fully aquatic — cannot move well on land. Drinks fresh water from surface rain layer. Floats among debris hunting small fish.

Up to 5 m with vertical tiger-like stripes (fade with age). Eats almost anything — license plates, tires, and human remains have been found in their stomachs.

Second only to great white in unprovoked human attacks. Common in Caribbean and Hawaiian waters. Slow but powerful — strikes once and waits.

Tropical and subtropical waters — Florida, Caribbean, Gulf of Mexico, Hawaii.

Solitary, mostly nocturnal. Migrates long distances. Females birth up to 80 live pups.

Stocky, aggressive shark up to 3.5 m. Uniquely tolerant of fresh water — found in Mississippi, Amazon, even Lake Nicaragua.

Top contender for most dangerous shark to humans. Hunts in shallow, murky water — exactly where people swim. Many attacks attributed to 'great whites' are actually bull sharks.

Shallow coastal waters, estuaries, rivers — Florida, Gulf of Mexico, Caribbean (Cuba, Bahamas, DR), Lake Nicaragua, Mississippi River, Pacific coasts of Mexico and Central America.

Aggressive and territorial. Tolerates salinity from 0 to 53 ppt. Attacks unprovoked more than other sharks.