1. Belonging to the clade Gymnosomata, sea angels are diminutive sea slugs that rarely exceed seven centimeters in length. They derive their name from their wing-like appendages that enable them to glide through their aquatic habitat.
2. Sea angels exhibit a captivating movement. Their elegance stems from their pulsating motions that resemble a coordinated dance. Moreover, these animals are semi-transparent, revealing their internal organs and gonads.
3. One can observe the inner workings of a sea angel without any special equipment. These creatures offer a fascinating glimpse into their anatomy and physiology.
4. Sea angels have many remarkable features. They are hermaphrodites, meaning they can change sexes. Their mating rituals involve a lot of spinning, which may seem inappropriate to some human observers, but it is actually quite beautiful to witness.
5. A sea angel pair remains attached during these rituals, spinning for hours while enjoying the sounds of the ocean's depths.