"Sebae" is a generic term that I swear is used to describe any clown anemone that people can't identify. I have seen almost every clown anemone species described as a "sebae" anemone at one time or another. Most frequently it is used as a generic term to describe H. malu, H. crispa, or sometimes even H. magnifica.
Your anemone, H. crispa, is actually pretty cool. It is a long tentacle anemone, and when healthy, can display the longest tentacles of ANY clown anemone - in some cases 6" long or longer. They prefer mixed rock / sand beds where they can hide their column in sand or in rock crevices. They typically have white/off white columns and oral disks, with bright balls of color on the tips of their tentacles. Rarely you can find solid purple ones, and VERY rarely you can find solid sky blue ones. They tend to be a little fickle about environment, and aren't particularly good shippers, and will easily expel all their zooxanthellae when stressed to be left in an opaque white color. Because of this white pigment, they are easily dyed and will often be seen a garish pink or yellow in the LFS. These are not natural colors for the species, so if you see a yellow or pink H. crispa, you know it has been dyed.
Once settled into a tank they can be very robust and get quite large. They have the second broadest range of all the clown anemones (behind E. quadricolor) and can be found in temperate waters all the way down to South Australia. I think they are probably my second favorite clown anemone overall
Congrats! But make sure he gets a fair amount of flow and lots of light!
Here are a few photos of H. crispa in the wild to see what they look like naturally. I'm gonna be in Fiji in a couple of weeks and I'll try to take a few more H. crispa shots...
