Religion: Atlantean Greco-Roman classical religion
Name: Little Mermaid
Alter Ego: Ulla Paske
Other Names: Little Mermaid II
First Appearance: The Super Friends (vol. 1) #9 (Dec. 1977): "Three Ways to Kill a World!"
Super? (Has Super Powers/Special Abilities/Technology): Yes
Number of Appearances: 18
"Little Mermaid appeared as a member of the Ultramarine Corps in JLA Classified #2 (Feb. 2005), and the Ultramarine Corps appeared in 4 subsequent comics: JLA: Classified #3, JLA #41, and Wonder Woman (vol. 2) #174-175. Aside from substantive appearances in JLA Classified, the other appearances have essentially been cameos.
Some sources refer to the "Little Mermaid" who appeared as a member of the Ultramarine Corps as "Little Mermaid II," a character distinct from the original (Ulla Paske). But most sources identify the "Little Mermaid" of the Ultramarine Corps as Ulla Paske, the original DC heroine to go by that name.
Suggested links for further research about this character and the character's religious affiliation: