The Trifilter has replaced its ancestor. The trigon had become in desperate need of a new food source because of the rise in predators. So it started to filter feed since there were no mobile filter feeders. But it has become smaller so there would be a less likely chance of predators seeing it (this is also why it has no lights because it has no eyes to see with).
Living Relatives (click to show/hide)
These are randomly selected, and organized from lowest to highest shared taxon. (This may correspond to similarity more than actual relation)
