Nalu wears seaweed around him, but no shirt, revealing lots of skin, but nothing at all sexual. Mermaids are in love with each other, talking about crushes. Mermaids wear short clothing, revealing lots of skin.

Nalu's mermaid friend is quite rude to others. Fungus Maximus and the other fungus are quite threatning to other characters. Laverna is very evil.

Fungus calls Nalu "fishy", only using the term because he's a mermaid.

The magical berries sort of act like pills, but are not drugs or refered too as them.

Fungus Maximus threatens to kill all of the mermaids with a vial of poison on multiple occasions. This can be intense for some children but the scene stays completely mild.