Common name: Flatworm

Scientific name: Leptoplana tremellaris (O.F.Müller, 1773)

General Information

The flatworm Leptoplana tremellaris is a fascinating marine species often found in tidal zones and shallow waters. Known for its elongated and flattened body, it is a member of the Platyhelminthes phylum. This species is not commonly kept in home aquariums but is of interest to hobbyists and researchers due to its unique physiology and behavior.

While not a staple in the aquarium trade, Leptoplana tremellaris can be an intriguing addition to a specialized marine setup, especially for those interested in replicating tidal or lagoon environments. This flatworm plays an essential role in the ecosystem by participating in the breakdown of organic matter and controlling the population of smaller invertebrates.

Details

Recommended minimum tank volume
20 liter (5.3 gallons)
Salinity
S.G. 1.023 to 1.026
Temperature
22 to 26 °C (72 to 79 °F)
Acidity
pH 8 to 8.5
Average size
5 cm (2″)
Care level
Moderate to difficult
Diet
Carnivore Feeds on small invertebrates and organic detritus
Reefsafe
Yes
Aggression
Peaceful Generally peaceful but may prey on very small invertebrates
Captive bred
No

Taxonomy

  1. Kingdom
    Animals
    Animalia
  2. Phylum
    Flatworms
    Platyhelminthes
  3. Class
    Turbellarians
    Rhabditophora
  4. Order
    Polyclad Flatworms
    Polycladida
  5. Family
    Comb Jellies
    Leptoplanidae
  6. Genus
    Flatworms
    Leptoplana
  7. Species
    Flatworm
    Leptoplana tremellaris (O.F.Müller, 1773)
  8. Synonyms
    Centrostomum jaltense Czerniavsky, 1881
    Elasmodes flexilis (Dalyell, 1814)
    Fasciola tremellaris O.F.Müller, 1773
    Leptoplana flexilis (Dalyell, 1814)
    Leptoplana hyalina Ehrenberg, 1831
    Leptoplana laevigatus (Quatrefage, 1845)
    Leptoplana levigata (Quatrefage, 1845)
    Leptoplana tremellaris taurica Jacubowa, 1909
    Leptoplana tremellaris taurica Jacubowa, 1909
    Planaria flexilis Dalyell, 1814
    Planaria tremellaris (Müller, 1773) Müller, 1777
    Polycelis laevigatus Quatrefage, 1846
  9. Source: GBIF | Global Biodiversity Information Facility

Physical Appearance and Distinguishing Characteristics

Leptoplana tremellaris is characterized by its soft, flexible body that can measure up to several centimeters in length. It exhibits a translucent appearance with subtle color variations ranging from white to light brown, often with a mottled pattern that helps it blend into sandy or rocky substrates. Unlike some other flatworm species, it lacks prominent features such as tentacles or eyespots, making it a master of camouflage.

Behavior and Compatibility

This species is generally peaceful and can coexist with a variety of marine invertebrates. However, due to its diet, it may pose a threat to very small invertebrates or eggs. It is not typically aggressive and spends much of its time gliding over surfaces in search of food.

Diet and Feeding

Leptoplana tremellaris is a carnivore, feeding on small invertebrates and organic detritus. In captivity, it can be offered a diet of finely chopped seafood, brine shrimp, and other small marine organisms. Feeding should be done sparingly, as overfeeding can lead to water quality issues.

Habitat

This flatworm is naturally found in the intertidal zones of the northeastern Atlantic Ocean and the Mediterranean Sea. It thrives in environments with sandy or rocky substrates where it can easily camouflage and hunt for food.