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User1
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View BadgesThey will eat them if you feed them fresh Caulerpa that are not prey on my tangs. They don't often eat Caulerpa that grow in DT.
It is very possible that as Caulerpa being eaten by fish, they start to form chemical that deter fish from browsing on them. When this pressure is remove, the algae no longer produce this bad tasting chemical and make it a lot more palatable to the fish.
I have nothing to back this up, other than it is just my hunch and this is a fairy common strategy of plants use to deter grazing.
The algae I was testing with was gracilaria parvispora I believe. Red. There is a yellow that also resembles it. In any case great stuff and my tangs and rabbit love it.