Fin dream meaning is explained below using 3 different sources. Each interpretation is shown with its source.

Interpretation 1 — Theresa Cheung

Any type of fin in your dream signifies a factor in your life that is a motivational or directional force.

Gill

In dreams, gills may suggest highly developed spirituality; the intake of spiritual aspects is as natural and effortless as breathing.

Source: The Element Encyclopedia Author: Theresa Cheung

Interpretation 2 — Stearn Robinson - Tom Corbett

See Fish.
Source: The Complete Guide to Interpreting Your Dreams Author: Stearn Robinson - Tom Corbett

Interpretation 3 — Versatile - Anonymous

See fish
Source: Dream Meanings of Versatile Author: Versatile - Anonymous