At this point I'm not sure what it is myself, however that stark bright yellow is NOT normal. I also would suspect a dyed anemone. They do sell what are called yellow anemones, however they are fainter than that yellow. I have never heard of a carnaition anemone. Once these so called yellow anemones are under proper lighting they regain the normal tan/brown coloration of the zooxanthellae.
Heteractis Malu, Macrodactyla doreensis, Heteractis aurora and H. crispa also live burrowed into sediment. The columns of all four species may have red or yellow blotches; that of H. crispa is much firmer than that of H. malu (which is similar to that of H. aurora). In contrast to animals of the other three species, H. malu has relatively short tentacles, typically of variable length; tentacles of the other two species of Heteractis may also be magenta-tipped. Tentacles of H. crispa may contract in the absence of a fish, but H. malu has fewer tentacles per radial row; tentacles of H. aurora may be similarly sparse, but have swellings at intervals.
The normal zooxanthellae tends to be tan/brown in anemones, this one does not look normal.
Thomas