Under the Boardwalk does not feature any explicit LGBTQ+ characters, relationships, or themes. While it explores universal themes of prejudice and acceptance through a cross-community romance, these are not specific to LGBTQ+ experiences. Therefore, the film has no identifiable LGBTQ+ depiction.

Based on available information, 'Under the Boardwalk' does not appear to feature identifiable transsexual characters or themes. There is no evidence to suggest any depiction, positive, negative, or neutral, of the transsexual community within the film's narrative.

The movie does not contain any action or adventure elements.

The film features original characters and is not an adaptation of existing source material or historical records. Consequently, no characters have an established prior gender from which to deviate.

The film features anthropomorphic crab characters whose race was never established as human in any source material. Therefore, no race swap can occur.