The lifespan of craterfish is about ten years. The calamus is a large tropical fish with bright colors. It has a large food intake and likes neutral water. The suitable temperature is 20-30 degrees Celsius, and the aquarium should be large. The calamus does not have strict water quality requirements, and can live in the water temperature of 20 to 30 degrees, and the optimum growth temperature is 23 to 25 degrees.

Although the cassowary is an omnivorous fish, it does not choose food, but it also prefers animals Sexually active feed. The principle of polyculture must be paid attention to when raising craterfish. Because craterfish prefer animal feed, they have the nature of chasing small fish, so be careful not to mix with other tropical fish.

The biggest feature of calamus is that it is very difficult to identify males and females, but calamus is also a more distinctive species. The calamus native to North America and Mexico is larger in size, and the adult fish can reach 10-15 cm in length.