Ptereleotris
Ptereleotris is a genus of fish in the family Gobiidae, commonly known as “dwarf gobies”. These small, brightly colored fish are found throughout the Indo-Pacific region. They are popular in the saltwater aquarium trade due to their peaceful nature and striking appearances.
Characteristics
Ptereleotris species typically have elongated bodies and are characterized by their unique dorsal fin structure. They have a single dorsal fin that is separated into two distinct parts: an anterior portion with a few spines and a posterior portion with soft rays. The majority of the dorsal fin is composed of the soft-rayed portion. Their pelvic fins are fused to form a suction disk, which they use to attach themselves to rocks and coral.
Habitat
Dwarf gobies inhabit a wide range of marine environments, including coral reefs, rocky shores, and seagrass beds. They are generally found in shallow, tropical waters. They are typically associated with specific symbiotic relationships with other marine species, such as shrimp or snapping shrimp. They often reside in burrows or crevices provided by these symbiotic partners.
Feeding
Ptereleotris species are carnivorous and primarily feed on small invertebrates, including plankton, crustaceans, and worms. They are often seen picking at algae or detritus as well.
Reproduction
Ptereleotris species are protandrous hermaphrodites, meaning they start life as males and later transition into females. The males establish territories and defend them against other males. Females typically lay eggs in a nest built by the male, and the male cares for the eggs until they hatch.
Species
There are over 20 recognized species within the genus Ptereleotris, with some of the most commonly known and kept in aquariums including:
- Ptereleotris microlepis (Orange-spotted dwarf goby)
- Ptereleotris zebra (Zebra dwarf goby)
- Ptereleotris helenae (Helene's dwarf goby)
- Ptereleotris evides (Black-spotted dwarf goby)
- Ptereleotris grammica (Grammic dwarf goby)