In recent years, so-called “mer-culture” has been on the rise. Then, there’s the whole “finfluencer” trend, with mermaids and mermans like Grace Page and Merman Chris making a splash on social media.

Alien fanatics are currently enjoying a prolonged field day, with a whole host of conspiracy theories and sightings to get their teeth into. From whistleblower “revelations” about hushed-up spacecraft ...