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The pale-throated three-toed sloth (Bradypus tridactylus), which inhabits tropical rainforests in northern South America. It is similar in appearance to, and often confused with, the brown-throated three-toed sloth, which has a much wider distribution. Genetic evidence indicates the two species diverged around six million years ago. [10]
Famously slow-moving, a sloth travels at an average speed of 0.24 km/h (0.15 mph). [8] Three-toed sloths are about the size of a small dog or a large cat, with the head and body having a combined length of around 45 cm (18 in) and a weight of 3.5–4.5 kg (8–10 lb).
Depending on their needs, fish can rapidly alternate between synchronized fin beats and alternating fin beats. [20] According to Guinness World Records 2009, Hippocampus zosterae (the dwarf seahorse) is the slowest moving fish, with a top speed of about 5 feet (150 cm) per hour. [21]
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Most fishes generate thrust using lateral movements of their body and caudal fin, but many other species move mainly using their median and paired fins. The latter group swim slowly, but can turn rapidly, as is needed when living in coral reefs for example. But they can not swim as fast as fish using their bodies and caudal fins. [1] [2]
Image credits: pubitypets Then there’s the sloth, the polar opposite in terms of speed. These adorable, slow-moving creatures only poop once a week. Can you even imagine going that long without ...
Thalassocnus is the only aquatic xenarthran—a group that includes sloths, anteaters, and armadillos—though the ground sloth Eionaletherium from the Miocene of Venezuela may have adapted to nearshore life, as well as Ahytherium from the Pleistocene of Brazil. [15]