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Live-Bearing Fish Reproduction: A Beginner's Guide

Learn about live-bearing fish species like Mollies, Guppies, and Platies, their habitats, reproductive methods, and care tips. This guide is from Dr. Craig Kasper's HCC Aquaculture Program, Spring 2007. Dive into the fascinating world of these aquatic wonders!

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Live-Bearing Fish Reproduction: A Beginner's Guide

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  1. Live Bearing Fish Reproduction Dr. Craig Kasper HCC Aquaculture Program Spring 2007

  2. sailfin molly, Poecilia latipinna Introduction • Live bearing or ovoviviparous fish • Species of interest to aquarists are almost always members of the family Poeciliidae, most commonly guppies, mollies, platies and swordtails. • Live-bearing fish are often easy to spawn and provide a great introduction to the hobby of fish aquariums.

  3. Mollies (Poecilia spp.) • Habitat: fresh, marine, brackish (preferring marshes, lowland streams, swamps and estuaries in the Americas. • Food: algae, plants, aquatic invertebrates, mosquitoes. • Temperature: • Reproduction: Internal fertilization (gonopodium ♂) • Gestation: 3-4 weeks • Brood size: 10-140 (live) • Parental Care: None

  4. Guppy (Poecilia reticulata) • Habitat: fresh, marine, aquaria, hard water pH 5.5-8.5 • Temperature: 22°C-28°C (68°F-82°F) • Food: omnivors • Reproduction: Internal fertilization, ♀ “gravid spot” near the anus enlarges and darkens. Females store sperm (can result in multiple spawns from the same sperm (superfetation) • Gestation: 3 -4wks • Brood size: 20-60 • Parental Care: None

  5. Guppy (Poecilia reticulata) Guppie morphs!

  6. Platyfish (Xiphophorus spp.) • Habitat: They prefer water with a 7.0–8.0 pH, moderately hard • Temperature: 18°C-25°C (64°F-77°F) • Food: omnivors • Reproduction: Internal fertilization, slight sexual dimorphism (male’s caudal fin slightly pointed) • Gestation: 3 -4wks • Brood size: 40-50 • Parental Care: None Xiphophorus maculatus

  7. Butterfly SplitfinAmeca splendens • Habitat: They prefer water with a 7.0 pH, moderately soft water • Temperature: 20°C-25°C (68°F-77°F) • Food: omnivors (voracious) • Reproduction: Internal fertilization, slight sexual dimorphism • Gestation: 6 wks • Brood size: 40-50 • Parental Care: None

  8. Halfbeaks (many) • Habitat: brackish water (hard), pH 7.0-7.5 • Temperature: 20°C-25°C (68°F-77°F) • Food: omnivors • Reproduction: Internal fertilization • Gestation: 6 wks • Brood size: <50 • Parental Care: None

  9. Halfbeaks (genus) • Arrhamphus • Chriodorus • Dermogenys • Euleptorhamphus • Hemirhamphodon • Hemiramphus • Hyporhamphus • Melapedalion • Nomorhamphus • Oxyporhamphus • Rhynchorhamphus • Reporhamphus • Tondanichthys • Zenarchopterus

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