The pinnacle of mermaid humor… merlions!
Levia-tan is hardcore. A lava bath holy shit.
Muromi-san was a pretty okay 15-min comedy, although I can’t say the humor was a good hit for many. It definitely tries to stand out a little, and I’m constantly giggling whenever they make references to the mermaids screwing up our evolutionary process due to silly grudges and what not. Too bad we never got to see more of Levia-tan in action too, she’s easily the best mermaid.
Definitely no Seto no Hanayome, but watch it for the quirky humor, lively animation and decent seiyuus.