In Sundarbans, the major WildAnimals are

Mammals–

Royal Bengal Tiger

 

Royal Bengal Tiger,
Fishing cat,
Leopard cat,
Axis or Cheetal deer,
Wild Boar,
Gangetic Dolphin,
Irawaddy Dolphin,
Otter, Porpoise,
Rhesus Monkey,
Mongoose,
Jungle cat,
Jackal, Fox, Civet.





Reptiles – Sea Turtles :
Olive Ridley turtle,
Green turtle,
Hawksbill turtle,
River Terrapin : Batagur baska.

Cobra Snake

Snakes : King Cobra,
Cobras,
Russell’s viper,
Kraits,
Sand Boa,
Dogface water snake,
Sea-snakes. 
          
Crocodile & Lizards : 
Estuarine Crocodile, 
Monitor Lizards (water monitor & yellow monitor).

Blackped Kingfisher

Birds – Goliath Heron (only in sundarban), Brahminy Kite, White-bellied Sea Eagle, Serpent Eagle, Shikra, Herons, Cormorant, Lesser Adjutant, Kingfishers, Bee-Eaters, Orioles, Bulbuls, Tailorbird, wood-peckers, Ibis, Snipes, Whimbrel, Curlew, Sandpipers, Plovers, Gulls, Terns and many others.

Marine Animals – Sea-anemone, Sea-fir (Obelia spp.), Jellyfish, Cuttle fish, Squids, Star-fish, Crabs (Hermit crab, Ghost crab, Giant mud crab, Fidler crab & others), Horse Shoe crab, Shrimps, Prawns.
Fish:  Hilsa, Bhetki, Pomfret, Parse, Topse, Tangra, Kanmagur, Pairachanda, Bele, Bhangan, etc.

Others: Toad fish, Sharks (whale shark, tiger.