Teredo navalis is believed by several authorities to be native to the European western Atlantic. It is now, however, a cosmopolitan species found both in Atlantic and Pacific oceans from the tropics and subtropics to cool temperate waters of both the northern and southern hemisphere (Did?iulis 2007). Details of the distribution of Teredo navalis within the India River Lagoon region are not known. The cosmopolitan distribution of the species and its euryhaline nature (see below), however, suggest it may be well established.
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