Second, it seems unlikely that agnostids lived on the seafloor.

其次， 似乎 agnostids 不太可能生活在海底。

But agnostids had tiny, poorly developed eyes, and were sometimes completely blind.

但是 agnostids 的眼睛很小， 发育不良，有时甚至完全失明。

However, many agnostids species inhabited multiple geographic areas spread across large distances.

然而， 许多 agnostids 物种居住在跨越很远距离的多个地理区域。

This suggests that agnostids were able to move from one area to another pretty fast.

这表明 agnostids 能够非常快地从一个区域移动到另一个区域。

But we;re pretty sure that the populations of many agnostids were in fact very large.

但我们非常确定许多 agnostids 的种群实际上非常大。

So the great size of agnostid populations seems to rule out the theory that they were parasites.

因此，巨大的 agnostid 种群似乎排除了它们是寄生虫的理论。