This is the False Gavial (Tomistoma schlegeli), one of the rarest crocodilians. They occur across southeast Asia, this one was photographed in Borneo. They prefer peat swamps, or swamp forests, but also occur along jungle streams. They get big... this one was over 5 meters long, but are not known to prey on humans. They have no commercial value in that their skin has boney ossicles in the scales, making the leather useless. Nevertheless, interested croc farm owners in Malaysia and Thailand are the only breeders of the this species.
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