that reefermadness pic is h. crispa and yes the tenticles will grow longer as it matures , not so much with malu . i have read that the tenticles will shorten in the absence of clownfish however that did not happen to my 8"-10" specimen when i had to remove all fish from my system for three months due to ich . still need to factor in that it didn't have the stress of shipping . it's my guess that the anemone pictured was not in their system very long . to me from what i can see of anthworks pic , it looks like a small crispa which is spread out to expose more surface area to light . i could be wrong , again time will tell . btw , doesn't take long once settled in when environmental conditions are met and it's fed well .