EVERYDAY SCIENCE

Detailed explanation-1: -Mammalian dolphins are any of the toothed whales belonging to the mammal family Delphinidae (oceanic dolphins) or the mammal families Platanistidae and Iniidae (river dolphins). Most dolphins are among the smaller species of toothed whales, measuring less than 3 meters (10 feet) in length. More items •22-Feb-2023

Detailed explanation-2: -Dolphins are part of the mammalian order Cetacea, which contains about 90 species of whales, dolphins and porpoises. Of these, the gigantic blue whale is the largest and the freshwater or river dolphin the smallest.

Detailed explanation-3: -Cetaceans. Dolphins, porpoises, and whales all belong to a group of marine animals known as cetaceans.

Detailed explanation-4: -NOAA. Bottlenose dolphins (Tursiops truncatus) are very social animals, and often travel and hunt in groups called pods. The most common is a nursery group of 5-20 dolphins made up of females and their calves-although occasionally they will gather in groups (with males) of 1, 000 or more.