1. Aggression: Moray eels are territorial and will often display aggressive behavior towards other moray eels. They may fight for territory, food, and mates, resulting in injuries or even death.
2. Competition: Moray eels are voracious predators and will compete with each other for food. This can lead to one eel becoming undernourished and malnourished, while the other thrives.
3. Stress: The constant stress of living in close proximity with another moray eel can lead to health problems and a shortened lifespan. Stress can manifest in a variety of ways, including decreased appetite, lethargy, and susceptibility to disease.
4. Tank Size: Keeping two moray eels together requires a significantly larger tank than would be needed for a single eel. Moray eels need plenty of swimming space and hiding spots to feel secure. A tank that is too small can exacerbate the problems of aggression and competition.
5. Compatibility: While some moray eel species may be more tolerant of tankmates than others, there is no guarantee that two different moray eels will get along. It is always a risk to put two moray eels together, and the consequences can be severe.
If you are considering keeping a moray eel, it is best to keep it in a species-only tank. This will help to ensure the health and well-being of your eel.