Cetacea

Cetacea, ek rakam ke jaanwar hae jon ki paani me rahe hae; jaise ki saagar, samundar aur naddi me. Dolphin, whale aur porpoise, ii group ke jaanwar hae. Cetacea khaas kar ke khaali paani me rahe hae, iske chikkan dehin hae, barraa size hae aur ii jaada kar ke gos khaae hae.