What is the definition of Johnstonella?

Johnstonella is a peculiar, fictional genus of algae that resembles a cross between a lush green superhero cape and a goofy, yet oddly charismatic, unicorn. It's like the algae equivalent of a glittery, flamboyant mascot from a sci-fi movie, but instead of sparkles, it has a green, leafy power-up.

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Here's an edgy example sentence: "In the wake of the Johnsonella apocalypse, the local gym decided to incorporate this algae into their cardio machines, claiming it would boost their 'green energy' levels. 'Just a little bit of natural sunshine,' they'd say, but let's just hope it doesn't turn their workout routines into a green revolution."