The Lady Dragolden has replaced its ancestor. Since the centifin and the strainbean evolved, the seadragolden had to adapt to a new situation. Though taking its time, this old timer slowly transformed and specialized in eating new kinds of creatures. Among these creatures are the centifin's own descendant, the echofin, and a few new organisms, like the small parasite whorl and the mysterious dark swarmer.
Since it now eats smaller creatures, the Lady Dragolden became a bit smaller and thinner. This new thin body enable the Lady Dragolden to chase it's pray more easily and wrap around it more conveniently.