The largest giant otters can grow to about two meters long, with even larger specimens reported throughout history. It's the largest animal in the Mustelid family, and also the noisiest, with a wide variety of calls. Though their diet primarily consists of fish, giant otters have been known to eat small caimans and anacondas. They appear to cooperate in hunting groups to take down larger caimans and snakes.
Giant Otters Are Fierce Predators
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Key Facts In This Video
Adult giant otters will attempt to fight a caiman to protect their cubs and access their den. 00:05
Giant otters will harass caimans by going after their tails. 01:02
Listen to the loud vocalizations of giant otters as they fight with a caiman: 01:25