Incorrect word usage in Bluegill description

The description for this fish reads:

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This voracious freshwater fish, once indigenous to the island, has long since found its way into Thavnair's water sources.

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But the fishing log entry says,

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Once presented to the satrap as a gift, this non-native wavekin is a rare find in Thavnair. Its propagating prowess, which in other lands presents a problem, is mitigated by its seeming inability to acclimatize to Thavnairian waters.

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The implication here seems to be that the Bluegill is not indigenous to Thavnair. The description seems to be a mistake.