- 1 Mr. Mer spawns after 3.33 seconds100f.
- Infinite Doge Darks spawn after 26.67 seconds800f, delay 16.67~20 seconds500f~600f.
- 1 Cala Maria spawns after 40 seconds1,200f.
- 1 Spacefish Jones spawns as the boss after 40 seconds1,200f.
The stage can be quickly cleaned up by luring Mr. Mer out and destroying him with high-damage units such as Can Can Cat, Dark Lazer, etc. while also making use of Octopus Cat and Supercat to stop the Mini-Wave damage. Once he is dead, nothing will stop you from clearing out the remaining peons. Maglev Cat can be used to pilfer extra money before and after Mr. Mer dies. Use four or more meatshields for Cala Maria.
- This stage's name refers to the famous Merlion statues of Singapore, which served as the basis for Mr. Mer's design.
- Fish-Legged Beuaty's Japanese, Tempting Fish-Legged Mermaid, may also be a reference to the song "HOT LIMIT" by T.M. Revolution; one of the lyrics can be translated as "With all those bare-legged mermaids around tempting me..."