Hi guys, This took me some time to collect and paste.Hope it will be relevant info for all of you.
Possibly a multiple factor inheritance is expressed in this type:
tail shaped like a capital D; an enhanced form of the Delt tail, with multiple branching of the rays of the fins.
Dorsal and anal fins are also enhanced with this trait. straight edges to tail fin desired in this trait, to give a semi-circular outline with caudal fin spread of 180o.
Many so-called HMs do not have the full 180o spread and are sometimes known as "Super Delta" Tails.
