Orcas

Orcas, also known as killer whales, are the undisputed rulers of the seas, whose prey includes even the great white shark. The orca has a broad diet, ranging from squid to fish, seabirds, sea turtles, and marine mammals. Large whales also attack each other in groups.

Source Pic: By Robert Pittman - NOAA (http://www.afsc.noaa.gov/Quarterly/amj2005/divrptsNMML3.htm), Public Domaini, https://commons.wikimedia.org/w/index.php?curid=1433661

Orcas are the largest animals in the dolphin family. Adult males can grow to almost 10 meters and weigh up to 9 tons. Females are significantly smaller, up to a maximum of 6 meters. The main distinguishing feature is the male's distinctive dorsal fin. The dorsal fin of a male orca, also called a killer whale, is particularly large and straight, which has earned it the name killer whale. It can grow up to 1.8 meters high, making it the tallest dorsal fin of all whales. In females, the dorsal fin is smaller and more crescent-shaped.

Source Pic: By Albino.orca - Own work, CC0, https://commons.wikimedia.org/w/index.php?curid=147623746

Orcas generally have a black back and white underside, white spots above the eyes (oval or almond-shaped), and a white "saddle spot" pattern behind the dorsal fin – this can vary slightly depending on the individual and population. They also have an oval, white spot behind each eye. In the wild, the average life expectancy of females is 50 years, while males reach an average age of 30. In some cases, both females and males can live longer.

Source Pic: By Winky from Vancouver, Canada - 5 orcas in johnstone strait, CC BY 2.0, https://commons.wikimedia.org/w/index.php?curid=7219815

This photograph was taken off the west coast of Graham Land, Antarctica from on board the National Geographic Explorer expedition ship. It captures four killer whales swimming in close cooperation just below the surface of the water as they charge an ice floe bearing a crabeater seal. By cooperatively hunting in this manner, the whales create a strong bow wave with which they hope to wash the seal off the ice floe. The seal, known informally as "Kevin", eventually escaped after enduring three dozen such attempts to make him into a shared meal.

Source Pic and Textt: By Callan Carpenter - Own work, CC BY 4.0, https://commons.wikimedia.org/w/index.php?curid=84531522