Scaphopods are found worldwide throughout the marine environment but not in brackish or estuarine systems. In terms of bathymetric distribution, they have been found from the intertidal zone in Australia to depths of about 23,000 ft (7,000 m) in the Sunda Trench, and are generally considered to be relatively well represented in deep-sea benthic (seabed) communities. Latitudinal distribution is similarly broad; scaphopods have been discovered well within both the Arctic and Antarctic Circles, and are found throughout temperate and tropical waters. While researchers have just begun to study the global distributional patterns of scaphopods, they know that the diversity of these animals in the Indo-Pacific region is relatively high, mirroring the distribution of diversity of many other marine taxa.

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