Orcas (Killer Whales)

Orcas (Killer Whales)

Orcas (Orcinus orca) are the largest members of the dolphin family (Delphinidae). They are among the most intelligent marine mammals and live in stable family groups known as pods.

General Information

Scientific Name: Orcinus orca

Family: Delphinidae (Oceanic Dolphins)

Length:

• Males: 6–8 m (20–26 ft)
• Females: 5–7 m (16–23 ft)

Weight:

• Males: up to 10 tonnes
• Females: up to 5.5 tonnes

Lifespan:

• Females: over 90 years
• Males: 40–60 years

Diet: Fish, seals, sea lions, penguins, sharks, and even large whales, depending on the population.

Global Distribution

Orcas are found in every ocean on Earth:

• Arctic Ocean
• North Atlantic Ocean
• North Pacific Ocean
• Tropical oceans
• Southern Ocean (Antarctica)

They prefer cool, nutrient-rich waters but can be found from polar regions to the tropics.

Social Behavior

• Live in matriarchal family groups.
• Calves often remain with their mothers for life.
• Each pod has its own unique vocal dialect.
• Hunting techniques and social knowledge are passed down through generations.

Interesting Facts

• Orcas are apex predators with no natural predators.
• They can reach speeds of up to 56 km/h (35 mph).
• The dorsal fin of an adult male can grow to 1.8 m (6 ft) tall.
• Scientists recognize more than 10 distinct ecotypes worldwide, each with unique behavior, diet, appearance, and vocalizations.

Image source, own work, graphic based on ChatGPT

Source Text, reference, https://en.wikipedia.org/wiki/Orca

Orcas and Great White Sharks

South Africa was once a hotspot for great white sharks. Gansbaai (a town in the Overberg district of South Africa's Western Cape province) had a population of 800 to 1,000 great white sharks in the 2010s. In 2015, two orcas appeared for the first time. They were said to hunt the sharks. They were called "Port and Starboard." Both orcas have a bent fin, which is normally only found in captive animals. It wasn't until the beginning of 2020 that drone footage was able to prove that orcas do indeed hunt and consume great white sharks… but only the animals' livers, as these are full of fats and oils. Since then, great white sharks have retreated from Gansbaai, and almost no shark sightings have been reported.

Video Orca / White Shark: https://www.youtube.com/watch?v=aK0iqgO_inE&t=13s

Video Orca / Whale Shark: https://youtu.be/o4UCFJZauAM

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