Simply put, you need to research the specific species of eel you have. Echidna rhodochilu is another species of freshwater moray eel that's seen in pet trade. Fire Eels generally cost around $12-20, whereas others like Tire Track Eels will cost $16-20 and Electric Eels $300. The only thing that you need to worry about is the flooring material and the vegetation level of your tank. They will go after smaller fish when given the chance, but usually prefer to eat foods like live shrimp, frozen bloodworms, and tubifex. It has a gray body that's covered in many golden yellow dots that are present along the lateral and dorsal sides. The half-banded spiny eel is one of the smallest freshwater eels you can raise, making it the perfect candidate for aquarium hobbyists with smaller tanks. The reason for this is because there are many species of freshwater fish tank eels out there, and they all grow to different sizes. They also like plenty of hiding spots, like driftwood, rocks, and caves. There are other species of freshwater aquarium eels too. Some of the best tank mates for freshwater eels include; If you have a species of eel that is not very large or aggressive, the best tank mates may be other fish which are also non-aggressive. Eels can be pretty shy and like their privacy. Echidna rhodochilu is another species of freshwater moray eel that's seen in pet trade. Until 2013, this subclass has been lumped together into a cohesive clade. All you need to do is provide them with some earthworms or bloodworms from time to time. If you are keeping Freshwater Snowflake Eels, we recommend that you purchase an aquascaping tool set which will contain long tweezers which can be used for feeding and long scissors for plant trimming to prevent being bitten as they have razor sharp teeth. This eel will usually grow to around 30 cm or 12 inches in length, so they are of a moderate size. What’s interesting about Asian swamp eels is that they are even more aggressive as young juveniles. There are some smaller and more peaceful ones which are pretty simple to care for, but many of them get very big, require lots of space, are aggressive and hard to keep with companions, and care can be quite expensive too.  Anguillidae do exhibit size-dependent sexual dimorphism. Just like the two previous species, the Black Spotted Eel comes from the Mastacembelidae family. However, they’re all the same. Why? Have a look: If you like colors and are looking for an eel that can add a glimpse of beauty to your tank, peacock eel is the best choice. Some species live in freshwater throughout their lives and return to the oceans to breed, like the European Eel (Anguilla anguilla). These eels don't show signs of intraspecific aggression when their environmental needs are met. However, there are a select few species that may live to 18 or 20 years old, as well as some that may live for as little as 8 or 10 years. Adult freshwater eels are elongated with tubelike, snake-shaped bodies.