Traits

Flipper fins are a frequently observed fin type across Aerius, and are characterized by two fins that overlap somewhat at their bases and have shapes that curve similarly to a traditional mermaid tail fin.  Usually the outside edge of each ‘flipper’ has a spine, but it varies - the spine can wrap around the entire edge of the fin, or there can be no spine.  This fin type is generally more opaque.

Butterfly fins are a frequently observed fin type across Aerius, and are characterized by three distinct pieces of thick and rigid fins shaped like pointed ovals, with the middle piece being smaller and layered behind the other two. Usually the outside edge of each fin has no spine, but it can vary- the spine can wrap around the entire edge of the fin,  just the very top of the fin or there can be no spine.  This fin type is generally more opaque.

Bloom fins are a frequently observed fin type across Aerius, and are characterized by two pieces of webbing that curve out along their edge and three spines - one at the top of the fin which curls slightly, one between the fin pieces, and one that curls slightly at the bottom.  This fin type is generally of medium opacity.

Wing fins are a frequently observed fin type across Aerius, and are characterized by their wing shaped webbing and singular spine at the top of the fin. Additionally wing fins possess the ability to open and close under the movement of the spine. This fin type is generally of medium opacity.

Scattered fins are a frequently observed fin type across Aerius, and are characterized by their five broad spines and comparably smaller five sections of webbing between them, with slight 'u' shaped curves on the edges that point in towards the body. While the spines are commonly thicker, they can vary in width.  This fin type is generally of medium opacity.

Spiked fins are a frequently observed fin type across Aerius, and are characterized by four spines and three sections of webbing whose edges have ‘u’ shaped curves that point in towards the body, with the largest section being the middle section.  This fin type is generally of medium opacity.

Horned fins are a less frequently observed fin type across Aerius, and are characterized by three spines with the top piece curving up, and two pieces of  webbing with edges that have large ‘u’ shaped curves pointing in towards the body.  This fin type is generally of medium opacity.

Frill fins are a less frequently observed fin type across Aerius, and are characterized by a flexible spine and a singular large piece of fin that folds into ruffles along the bottom.  This fin type is generally of lower opacity.

Spino fins are a less frequently observed fin type across Aerius, and are characterized by four long spines and three large pieces of webbing whose edges are shaped like a ‘v’ that points in towards the body.  It is believed that long ago, this fin shape proved useful for communication among Abyssal dwellers, due to the large expanses of glowing fin, and that this is why it is only found in Abyssal bloodlines.  This fin type is generally more opaque.

Fallen fins are a less frequently observed fin type across Aerius, and are characterized by four spines and three narrow pieces of webbing with edges shaped like a ‘u’ that point in towards the body.  This fin type is generally more opaque.

Elven fins are a less frequently observed fin type across Aerius, and are characterized most strongly by the two dramatically curling outer spines.  They possess a total of four spines and three pieces of webbing whose edges have ‘u’ shaped curves that point in towards the body.  This fin type is generally of medium opacity.

Draped fins are a less frequently observed fin type across Aerius, and are characterized by a complete lack of cartilage and their generally thin and flexible nature.  While they can fold into ruffles at the bottom like frill fins, it is not particularly characteristic of the type.  These fins generally tend to be on the longer side, and can be tied up into bows and knots without any pain for the Dextroluma who have them, which some prefer either for style or to avoid tripping over their own fins.  This fin type is generally of low opacity.

Satin fins are a less frequently observed fin type across Aerius, and are characterized by their two dramatically curved spines and three semi-rigid fins whose edges are slightly ruffled.

Although it is extremely unusual, there are occasionally dextroluma born whose fins have a shape that is not one of the standard types. This seems to have no ill effects on them, but their unique fin types also do not seem to be passed down and don’t seem to be able to be made of other materials.