The film 'The Mermaid' does not feature any identifiable LGBTQ+ characters or themes within its narrative. The story focuses on environmental issues and a heterosexual romantic comedy, resulting in no depiction of queer identity or experiences.

The film 'The Mermaid' does not feature any identifiable transsexual characters or themes. Its narrative focuses on environmentalism, romance, and the conflict between humans and mermaids, without addressing gender identity.

The movie does not contain any action or adventure elements.

The Mermaid (2016) is an original film with characters created specifically for this production. There is no prior source material, historical record, or previous installment from which characters' genders could have been established differently. Therefore, no gender swaps occurred.

The Mermaid (2016) is an original film by Stephen Chow. All characters were created for this specific movie, meaning there is no prior source material, historical record, or previous installment to establish their race. Therefore, no race swaps occurred.