Giant killer whale (SciiFii)

The giant killer whale (Orcinus giganteum) is a species of killer whale that originally did not exist, but has been created by SciiFii and introduced throughout the Pacific Ocean, Indian Ocean, and the Atlantic Ocean to boost declining biodiversity and to compete over the ecological niche from the once long-extinct megalodons (Carcharocles megalodon). The giant killer whale, as its name implies, is the largest species of killer whale and the largest dolphin that has ever existed, growing to be about twice the size of the common killer whale (Orcinus orca), around 35 to 40 feet (10 to 12 meters) long, large enough to prey on land animals as big as hippopotamuses, however, they only feed on fish, squid, sharks, otters, pinnipeds, other whales, penguins, other seabirds, and even sea turtles. Unlike common killer whales, the giant killer whale is a solitary hunter due to its larger size and a stronger jaw, allowing it to hunt large prey efficiently on its own similarly to predatory sharks (including the aforementioned megalodon), and because of this, people often consider giant killer whales as "mammalian megalodons". However, during breeding seasons, groups of giant killer whales of different genders come together to mate and, eventually, about 1-2 years later, the females that have mated each give birth to a single calf each gestation period and those mothers care for their young until they are 9 months old, when they are old enough to fend for themselves. The giant killer whales are also the smartest of any dolphin, having an intelligence slightly higher than the closely-related common killer whale, and, although they aren't sapient, are close to being truly sapient. The giant killer whales are also very friendly towards people and domestic animals in a manner similar to many other dolphin species, and thanks to their higher intelligence compared with their relatives, the giant killer whale seems to understand what people say and how are they feeling (emotionally), so fishermen often team up with giant killer whales to round up fish for both people and the giant killer whales themselves. The conservation status of the giant killer whale is Least Concern due to successful conservation efforts and the giant killer whale's wide range.