Largest mammal — Blue Whale Heaviest mammal — Blue whale Largest Carnivora Kodiak — Beer of Australia and Alaska Largest Chiroptera — Pteropus Largest Primate — Gorilla Largest Ape — Gorilla Largest Terrestrial Bird — Ostrich Largest Wing span — Albatross Largest living reptile — Turtle Largest lizard — Varanus Largest snake — Python Largest frog — Rana goliath (Africa) Largest fish — Rhinodon typus (1 8m, 9000 ibs) Largest carnivore fish — White shark Largest coral reef — Great barrier reef Largest breed of dog — St Bernard 130 kg Largest invertebrate — Giant squid Largest bone — Femur (In Frog Tibiofibla) Largest Muscle — Sertorisu (Buttock gluteus maximum) Largest Nerve — Vagus Largest cell — Egg of Ostrich Tallest Mammal — Giraffe Tallest poriferan — Poterian (4 feet) Largest porifer — Spheciospongia vesparium (3.5 feet) Longest cell — Nerve cell (Neuron) Largest live fish — Sturgeon Largest Egg producing fish — Mala mala Largest mammal — Blue Whale Heaviest mammal — Blue whale Largest Camivora Kodiak — Beer of Australia and Alaska Largest R.B.C. in mammal — Elephant Largest Gland — Liver Largest star fish — Pycnopodia Largest bivalvia — Tridacna Largest Gastropod — Hermifurcus Largest Shell — Bivalva giant clam Largest Insect — Ant of Africa (Dinopohtera) Largest Tick — Ambloyma Largest Coelenteratra — Cyanea (jelly fishes) Largest gestation period — Elephant Largest web — Nephila Largest egg — Ostrich Largest vein — Inferior venacava Largest fang — Gabbon viper tropical Largest land mammal — Elephant Largest eye (Mammal) — Horse Largest Eye (Mollusc) — Squid (15 inches) Largest arachnid — Giant spider Largest Insect — Golianthus (Africa) Largest zoo of World — Kruger (South Africa) Most venomous sea snake — Hydrophis Most venomous snake of world — Peninsular tiger snake of Australia. Largest R.B.C. — Amphiuma Largest virus — Pox virus