Lyretail mollies (Poecilia mexicana) are a type of fish that is native to fresh and brackish waters in Mexico and Central America. They are a popular aquarium fish because of their beautiful tail fins and their relatively easy care requirements. Lyretail mollies are generally considered to be hardy fish, but there are a few things you need to do to ensure they stay healthy and thrive in your aquarium.
First, it's important to provide them with plenty of space. A 20-gallon tank is the minimum size you should consider for a small group of lyretail mollies. They also prefer water that is on the warmer side, so an aquarium heater may be necessary. Additionally, lyretail mollies require access to both fresh and salt water, so you'll need to set up a separate freshwater or brackish water tank for them if you don't already have one.
Lyretail mollies are omnivorous, so they will eat just about anything you give them. However, it's important to provide them with a well-balanced diet that includes both plant and animal matter. A high-quality flake food or pellet can serve as the base of their diet, but you should supplement this with live foods (such as brine shrimp or bloodworms) and frozen foods (such as mysis shrimp or krill). You can also offer them blanched vegetables like zucchini or spinach on occasion.
As long as you provide them with the proper environment and diet, lyretail mollies should be relatively hardy fish that will thrive in your aquarium!