Essay on False Killer Whales Vs. Whales

1023 Words Dec 29th, 2015 5 Pages
False Killer Whales versus Killer Whales
Both Killer whales (Orcinus orca) and False killer whales (Pseudorca Crassidens) belong to the Delphinidae family. False killer whales resemble orcas because of the shape of their skulls, but the two species are actually not closely related (Baird, 2012). False killer whales are found in all tropical, subtropical, and warm temperate seas (MarineBio, 2013), usually in relatively deep offshore waters (Taylor, et al., 2008). In contrast, killer whales are often found in cold coastal waters (National Geographic, 2015). False killer whales are mostly solid black or grey, while killer whales are easily recognizable by their distinctive black and white coloring (Shamsul, 2012). Both species show considerable size dimorphism where males are larger than females (NOAA, 2015). Male false killer whales average 17.6 feet in length and 4,800 pounds while females average fifteen feet in length and 2,600 pounds. Males have an average lifespan of fifty-seven years while females have an average life span of sixty-two years (Shamsul, 2012). Killer whales are much larger than false killer whales. Male killer whales can weigh up to 22,000 pounds and can reach thirty-two feet in length. Males also have an average lifespan of thirty years while females have an average lifespan of fifty years (NOAA, 2015). Sightings of groups of false killer whales with a size of ten to twenty are common; however, an average herd size of fifty-five has been reported from…

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