From Nursery Groups to Competition Pods: The Diverse Lives of Whales

There are approximately 90 species of whales in the order Cetacea, contained in two suborders: baleen whales (Mysticeti), containing about 14 species, and toothed whales (Odontoceti), with about 76 species. While some whale species are known for being solitary, many others live in social groups called pods. Baleen whales, like the blue whale (Balaenoptera musculus), tend to be more solitary, often traveling alone or in small groups, while toothed whales, like orcas (Orcinus orca), are highly social and live in pods. However, solitary whales may come together for breeding or migration. Dive in to discover more about whales and how they live.

Pods

Pods are groups of aquatic animals, primarily marine mammals, that live together and interact. Smaller whale species are more likely to be found in larger pods than larger whale species. Dolphins and porpoises, classified as toothed whales, often live in social groups, sometimes numbering in the dozens or even hundreds. Baleen whales, which are typically larger, are solitary or live in smaller pods, consisting of just a few individuals or a mother-calf pair.

Dolphin Pods

Dolphins, classified as toothed whales, often live in pods that can range from a few individuals to several dozen, and some species regularly form superpods of hundreds or even thousands.

Smaller pods containing cows (mother dolphins) and their calves are called nursery pods. Nursery pods provide safety as the cows teach their young to hunt and avoid predators. The calves will remain with their mothers for three to six years.

Dolphins from smaller pods may join together with other pods for hunting and protection. Occasionally, hunting groups known as superpods may include hundreds of dolphins. They feed on prey that often congregate in schools, like squid, anchovies, and sardines. When they find a school of potential prey, the dolphins will start to swim closer together and then encircle the prey. If a group of dolphins encounters a group of killer whales (their predators), they will immediately form a tight group, fleeing en masse.

Humpback Whale Pods

Though mostly solitary, humpback whales do form temporary pods for migratory and mating purposes. Humpback whales migrate to warmer waters during the winter. Many humpback whales from the Northern Hemisphere travel to the warm waters off Hawaii, while many from the Southern Hemisphere migrate to Eastern Australia, though other breeding grounds exist for both populations. These migratory pods are short-lived, however, and disband once the whales reach their winter home.

The longest-lasting bond is between a cow and her calf. Humpback whale cows typically stay with their calves for about one year. During this time, the calves are dependent on their mothers for nursing and protection.  This close bond is crucial for the calf’s survival as it learn essential skills and build up the necessary blubber for their migration.

Competition Pods

A competition pod, also known as a comp pod or heat run, is composed of a group of male humpback whales aggressively vying for the attention of a single female whale in hopes of mating. These pods are characterized by intense physical interactions, including shoving, pushing, and other displays of dominance, as males compete to be closest to the female.

Competition pods are commonly observed during the whale breeding season. Peak competition activity occurs between January and March in the warm waters around Hawaii, and from June to October in Eastern Australia.

Narwhal Pods

Because they live in the icy depths of Arctic waters, narwhals are difficult to study. Male narwhals have a long, spiraled tusk located on the left side of their upper jaw, protruding through the lip. Their bodies can grow to be 12 to 20 feet long, and their horn-like tooth can be up to 10 feet long. These social animals live in pods of 2-20 individuals. They often join pods to form larger groups that can number in the hundreds.