Betta

I breed betta fish and cull my unwanted stock by feeding them to my oscar.

Source: tatoeba (6031488)

Rather than simply waiting for a clockwise turn and then presenting the mirror, past experience with another betta suggested that the turning behavior could be established more rapidly using a shaping procedure.

Source: wiktionary

"Do you know that Siamese fighting fish—bettas—excrete ammonia in their waste, and that ammonia is toxic to fish? Twenty-four hours flapping their little gills in the same, unfiltered water, and they're history.[…]"

Source: wiktionary

I had previously bought a bright red betta fish from the Chinese spiritual store, which I also sense had been sent for Aurayah.

Source: wiktionary