Hey scnute she has not had the opportunity with her spotty internet connection to translate my response so I will post it here in English for now;
H. crispa comes from the northern Indian ocean (India, Sri Lanka, Maldives) and unlike H. malu most H. crispa have a pretty uniform column and pedicle it is not nearly as smooth, being dotted with “wart like” spots toward the edge, the base is typically more broad as well being cream/eggshell white colored. As far as refering to a colored H. crispa, they should all be densly packed with almost uniform length tentacles ending in a pink tip. The common “un colored” H. crispa sold are bleached (not in good health). If you locate a yellow specimen with a matching yellow column, this indicates a dyed individual and should be avoided.
I find the best way (if you are having difficulty identifying a H. malu from H. crispa) is via the shape, smoothness of the pedicle, and it’s color. H. Malu typically has a more narrow slender column which is pale cream in color, but may also range in color from . It’s tentacles in comparison to H. Crispa tend to be less dense and often shorter stubby appearance with radial ring markings that are purple to magenta tipped. H. Malu range is typically in Austrailia and the Eastern Pacific Ocean, in shallower areas with a coarse substrate.
So to recap that I would first start with looking at the column and then the collection area, these should be your two largest indicators. Hope this has helped.