The scientific name for the Tucuxi Dolphin is Sotalia Fluviatilis. The Tucuxi Dolphin lives in the Atlantic Ocean, Amazon, Orinoco Rivers, and in habits the waters of Brazil, Panama, Peru, Ecuador, Colombia, Nicaragua, Venezuela and Honduras. The Marine Tucuxi is the largest and can grow up to 2.1 meters in length and weigh up to 119.05 lbs.The Riverine Tucuxi is much smaller growing up to 1.5 meters in length and being much lighter in weight.
The Spinner Dolphin lives in nearly all tropical and subtropical waters between 40° North and 40° South. The scientific name for the Spinner Dolphin is Stenella. The Spinner Dolphin weighs 51-170 lbs.
The South Asian River Dolphin's scientific name is Platanista gangetica. The South Asian River Dolphin lives in the Ganges-Brahmaputra-Meghna and Karnaphuli-Sangu river systems of Nepal, India, and Bangladesh. The South Asian River Dolphin looks like the Pink River Dolphin, but The South Asian River Dolphin is grayish.