Saltwater Lyretail Molly Fish - Sustainably Aquacultured

Single

$9.99

Saltwater Lyretail Molly Fish - Sustainably Aquacultured

Nano Fish Reef Safe

$9.99

SKU: MOLLYxSaltwaterS

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Diet

mysis shrimp brine shrimp marine flakes algae

Min Tank Size 50 gallons

Temperament Peaceful

Reef Safe Yes

Care & Diet Feeding, nutrition, and best practices.

Diet Type: Omnivore

Diet and Feeding: The Saltwater Lyretail Molly is an omnivore with a strong preference for algae and other plant matter in the wild, where it grazes on biofilm, filamentous algae, and tiny invertebrates. In captivity, it is beneficial to make the bulk of the diet high-quality spirulina-based flakes or micro-pellets, along with blanched marine vegetables such as nori or seaweed. To ensure balanced nutrition, supplement regularly with small servings of frozen or live mysis shrimp, brine shrimp, and occasional finely chopped marine fare. Offering seaweed on a clip and scattering small portions through the tank encourages natural foraging and active grazing behavior. Feed small amounts two to three times daily, providing only what is consumed quickly, and avoid overfeeding to maintain water quality and fish health.

mysis shrimp brine shrimp marine flakes algae

Behavior Temperament, activity level, and interactions.

Temperament: Peaceful

Saltwater lyretail mollies are active, midwater-to-surface swimmers that spend much of the day cruising open areas and sampling algae films, so they do best in a spacious tank with room to swim and some sheltered edges. They are generally peaceful and social, with a noticeable preference for keeping in loose groups; conspecifics are best maintained in small schools, as this reduces stress and helps natural behavior. A minimum of 20 gallons is recommended for a small group, with the layout including plants, driftwood, or other visual barriers to break lines of sight and give subordinate fish relief from persistent attention. They usually coexist well with other peaceful, reef-safe species, provided tank mates are not fin-nippers or overly boisterous competitors at feeding time. As omnivores with a strong algal grazing tendency, they feed readily on microalgae, biofilm, and plant matter, and should be supplemented with quality flakes, spirulina-based foods, and occasional frozen or live fare. Consistent access to vegetable-rich foods and stable water conditions will help maintain their coloration, activity, and overall condition.

Tank & Aquascape Tank requirements and aquascaping tips.

Min Tank Size: 50 gallons
Max Size: 6 inches
Care Level: Easy
Origin: Captive Bred

Compatibility Tank mates, aggression, and introduction order.

Temperament: Peaceful
Reef Safe: Yes

Reef & Health Reef safety, common issues, and prevention.

Reef Safe: Yes
Care Level: Easy

FAQs Answers to the most common questions.

Can a lyretail molly actually live long-term in full marine saltwater, or do they only do well in brackish water?

Lyretail mollies can live long-term in marine saltwater if they are properly acclimated and the tank is stable, but they are not true reef fish by nature. They are freshwater livebearers that have been line-bred to tolerate high salinity, so the key is gradual acclimation and excellent water quality. Many hobbyists keep them in brackish water or full marine salinity around 1.020–1.025 SG with success. Sudden salinity changes are what kill them, not salt itself.

Why do my saltwater lyretail mollies keep nipping at algae or picking at live rock instead of just swimming around?

This is normal behavior. Lyretail mollies are constant grazers and spend much of the day scraping biofilm, microalgae, and surface growth from rocks, glass, and decor. In a saltwater setup, they often act like tiny cleanup crew fish. If they stop grazing and begin hiding or breathing rapidly, that’s more often a water-quality or acclimation issue than a feeding issue.

What should I feed lyretail mollies in saltwater if there isn’t enough natural algae in the tank?

They need frequent small feedings of vegetable-heavy foods. Best choices include spirulina flakes, algae wafers softened for small mouths, blanched spinach, nori sheets, and high-quality flake foods with plant matter. In a saltwater tank, they still need a herbivorous diet even though they are in marine conditions. If they are fed too much protein-rich carnivore food, they can develop digestive problems and bloat.

Are lyretail mollies safe with reef invertebrates and corals, or will they bother them?

In general, yes, they are one of the safer fish choices for reef-style systems. They usually ignore corals, shrimp, snails, and most other invertebrates. The main caution is that they may graze over very small polyps or freshly settled coral frags if there is biofilm there, but they do not typically damage healthy corals. They’re best thought of as peaceful, reef-compatible, and useful for algae maintenance.

How can I tell if my saltwater lyretail molly is stressed from salinity, and what are the most common acclimation mistakes?

Signs of salinity stress include clamped fins, rapid breathing, loss of appetite, staying at the surface, darting, or lying low in the tank. The most common mistake is moving them too quickly from freshwater or low-end brackish water into marine salinity. Another mistake is using unstable water parameters, especially with ammonia or nitrite present. The best method is slow drip acclimation over several hours, with temperature matched first and salinity increased gradually rather than all at once.

Goes well with:

You will receive a fish SIMILAR in design and size to the fish in the photo. This is NOT a WYSIWYG fish.

Size: 1" to 2"

Saltwater Lyretail Mollies are hardy, versatile, and stunningly elegant with their flowing fins and vibrant lyre-shaped tails. Though commonly associated with freshwater, these mollies have been fully reared and acclimated to thrive in full-strength seawater, making them a unique and functional addition to marine aquariums.

Tank Requirements

These fish do well in tanks 20 gallons and up, especially in peaceful community setups. They enjoy open swimming space, moderate flow, and live rock structures where they can graze. Their active and social behavior brings lively movement to both reef and fish-only systems.

Perfect Live Feed Option

Saltwater Lyretail Mollies are an excellent live feed choice for finicky carnivorous fish such as cuttlefish, octopuses, eels, and certain predatory wrasses. Their soft bodies and manageable size make them ideal targets for species that often reject frozen or prepared foods.

Sustainably Aquacultured at TSA

Cultured in Top Shelf Aquatics' dedicated farm systems, these mollies are sustainably aquacultured and housed in isolation from other marine fish, ensuring they are pathogen-free and safe for sensitive systems. Each fish is raised and fully acclimated to natural seawater salinity (1.0263), making them reef-ready upon arrival.