From years of debating this issue on different forums, I personally think it comes to genetics. This would explain why silver arowanas are almost 100% certain to develop this condition on either or both their eyes as they mature, and blacks and africans dont ever seem to develop drop eye. Im sure tank conditions, food, etc. play a certain role, but I believe a fish's DNA will dominate this trait.
In asian arowanas its of course less likely to get drop eye, but its not uncommon. And I personally think this comes down to genes as well. Over the years ive seen LFS receive batches of asian arowanas from varies sources and farms, and ive noticed that in certain batches arriving from the same source, most of them will have a slightly dropped eye, while all of the arowanas from a different batch, of the same strain and size, will not exhibit the dropped eye, at least not at that time.
This is my opinion on drop eye, and it seems to make the most sense to me.
Cheers
In asian arowanas its of course less likely to get drop eye, but its not uncommon. And I personally think this comes down to genes as well. Over the years ive seen LFS receive batches of asian arowanas from varies sources and farms, and ive noticed that in certain batches arriving from the same source, most of them will have a slightly dropped eye, while all of the arowanas from a different batch, of the same strain and size, will not exhibit the dropped eye, at least not at that time.
This is my opinion on drop eye, and it seems to make the most sense to me.
Cheers
