Dolphin Size, Weight, and their Types

Here are some details about dolphin size, shape, weight, types, and the temperature of the water which is required for the dolphin to survive.

Dolphin is aquatic animals that’s means they live in water but dolphins are not fish they are mammals. Mammals are animals that produced milk and food for their babies.

Some whales make a group called Odontoceti. Odontoceti have large heads, hairless bodies, paddle-shaped front limbs, and teeth .odontoceti are divided into several small groups called families.

There are three types of families  of dolphin are

  • Marine dolphin 
  • River dolphin
  • Porpoises dolphin

River dolphin lives in freshwater which does not contain saltwater like an ocean. There are 6 species of river dolphins. They are found in different river systems in South  America and India and China recently.

Propoises are known as the family phocoenidae .peopl often use this words dolphin and propoise to mean same things but actually, they are different animals


The length and weight of the dolphin body vary among species. Some are about the same siz as we humans and some are about five or six times of that length.

Dusky dolphins grow to about 5 feet 3 inches (1.6m) long. The weight of at least 65 pounds (120 kg ).Amazon river dolphin phins grow to be up to  8 feet 6 inches (2.6 m ) long and their weight is approx 350 pounds(160 kg). Male killer whales may reach 31 feet (9.5 m) long and their weight up to approx 8.8 tons (8 metric tons ). Female killer whales may reach 23 feet (7 m ) long and their weight is approx. up to 4.4 tons.

A dolphin torpedo shape helps it to move swiftly and smoothly through the water. Dolphin cruise at speeds averages 3 to 4 miles per hour (5 to 6 km/hr ). Some dolphins traveling an average speed of 6 to 9 miles per hour (10 -15 km /hr ).Spotted dolphin is one of the fastest dolphin species. They have been timed for short sprint at speed close to 25 miles per hour (40 km/hr ).

size comparison of Dolphin

The tail of dolphin called flukes drive them forward . A dolphin flukes move up and down so that it travels fast. Dolphin tail muscles are strong so that animals jump high out of the water


Most mammals have hairy skin but dolphins have smooth skin. It feels like a warm wet rubber ball. An Amazon river dolphins skin feels more like soft, wet lather glove they have a few bristles on their snouts. Otherwise, they are hairless. Its skin is very sensitive to sunlight and can easily be injured.

Dolphin skin color varies according to species most species are various shades of black white and gray. The color patterns are often very beautiful.


All mammals dolphins keep a regular body temperature its ranges from 97 to 99 F (36-37 C) which is about the same as a human . A layer of blubber or fat about 1 inch (25 mm ) thick lies under a dolphin skin. The blubber is important for keeping a dolphin warm in cold water. The thick layer blubber layer also makes it difficult for sharks teeth to slice deeply into a dolphin body.

Types of dolphin

Ocean Dolphins

  • La Plata Dolphin
  • Long-beaked Common Dolphin
  • Short-beaked Common Dolphin
  • Common Bottlenose Dolphin
  • Indo-Pacific bottlenose Dolphin
  • Burrunan Dolphin
  • Northern right whale Dolphin
  • Southern right whale Dolphin
  • Guiana Dolphin
  • Indo-Pacific humpbacked Dolphin
  • Atlantic humpback Dolphin
  • Australian humpback Dolphin
  • Atlantic spotted Dolphin
  • Clymene Dolphin
  • Pantropical spotted Dolphin
  • Spinner Dolphin
  • Striped Dolphin
  • Rough-toothed Dolphin
  • Chilean Dolphin
  • Commerson’s Dolphin
  • Heaviside’s Dolphin
  • Hector’s Dolphin
  • Risso’s Dolphin
  • Fraser’s Dolphin
  • Atlantic white-sided Dolphin
  • Dusky Dolphin
  • Hourglass Dolphin
  • Pacific white-sided Dolphin
  • Peale’s Dolphin
  • White-beaked Dolphin
  • Australian snubfin Dolphin
  • Irrawaddy Dolphin
  • Melon-headed whale
  • Killer whale
  • Pygmy killer whale
  • False killer whale S
  • Hort-finned pilot whale
  • Long-finned pilot whale

River Dolphins

  • South Asian River Dolphin   
  • Baiji  Dolphin
  • Amazon River Dolphin  
  • Araguaia River Dolphin      
  • Bolivian River Dolphin   
  • Tucuxi  Dolphin

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