Species Profile
Marine Betta
Calloplesiops altivelis
Also known as: Comet Fish, Marine Comet
Bassletspeaceful
Adult size
8″
Minimum tank
55 gal
Temperature
72–82°F
pH
8.1–8.4
Schooling
Solitary OK
Water level
mid
Diet
Live ghost shrimp transitioning to frozen mysis, silversides, krill
Notes
Not actually a betta — a deep-water comet with long flowing fins covered in white polka dots. Shy nocturnal predator that eats anything that fits in its mouth (1–2″). Stunning under blue actinic lighting.
Photo: George Berninger Jr. / Wikimedia Commons · Source · CC-BY-SA-3.0