Cardinalfish are no strangers to the marine aquarium scene. The hobby has seen plenty of species from this group make an appearance, though the trade has been primarily focused on two in particular, the Banggai cardinal (Pterapogon kauderni) and the Pajama cardinal (Sphaeramia nematoptera). Despite the overwhelming popularity of these two species, Oceans Reefs & Aquariums is testing the waters with a newly aquacultured species from Japan, the rare Spotnape cardinalfish (Apogon notatus). As noted on the ORA blog, the Florida-based fish breeders acquired a batch of wild spotnape cardinals, but due to a lack of information being available, they didn’t really know what to expect in terms of behavior, feeding strategies, breeding, etc. But that didn’t stop the experts from giving it their best shot, and after some time they were successfully breeding the fish and learning all sorts of information about them. One of the biggest takeaways from rearing this fish is that, despite their muted colors, a small group of these cardinals is quite striking. They sport “silvery, rose gold colors” as ORA puts it, along with a spot just behind its eye and one on the tail. The fish has a maximum size of 4″, and their social nature makes them great for community reef tanks. Though ORA is having loads of success with this species, they are at a bit of a crossroads. They can either continue to raise and breed the fish, assuming there is a commercial demand for them, or they can shift their focus toward other species MORE: The Rare Japanese Spotnape Cardinalfish is Another Addition to the ORA Lineup