Glass Belly Guppies have translucent or glass-like bellies, adding an interesting visual element to their appearance. Their internal organs and colors are sometimes visible.
Out of Stock
Glass Belly Guppies have translucent or glass-like bellies, adding an interesting visual element to their appearance. Their internal organs and colors are sometimes visible.
Glass Belly Guppies have a unique translucent abdominal region, often completely see-through. This allows visibility of the swim bladder, digestive tract, and in pregnant females, the developing fry. Males are smaller with brighter colors and more elaborate fins, while females have larger, more rounded bodies with a pronounced gravid spot. The tail and dorsal fin may display varied patterns and colors, depending on the breeding line.
1-3 years
Omnivorous
The Glass Belly Guppy is more than just a beautiful fish — it’s a living biology lesson in your aquarium. Its peaceful temperament, easy care, and fascinating transparency make it a standout for both beginners and seasoned aquarists, especially those interested in breeding and observing fish development up close.
Beginner
10 gallons
6.8 – 7.8
Moderately hard to hard
22°C – 28°C (72°F – 82°F)
2.5 inches
Peaceful small fish like neon tetras, ember tetras, rasboras, mollies, platys, Corydoras catfish, and dwarf shrimp
Poecilia reticulata
Poeciliidae
Originally from South America; selectively bred worldwide for transparent body trait
Peaceful, active, thrives in groups
These guppies thrive on a varied omnivorous diet. A quality flake or pellet food should serve as the daily staple, but their health, coloration, and breeding performance improve significantly with regular feedings of live or frozen treats such as brine shrimp, mosquito larvae, and daphnia. Vegetable supplements like blanched spinach, zucchini, or spirulina-based flakes aid digestion and help prevent constipation.
Livebearer – females give birth to fully formed, free-swimming fry
Like all guppies, the Glass Belly variety is an exceptionally prolific livebearer. Females can store sperm for several months, giving birth every 4–6 weeks without repeated mating. Each brood can range from 20–60 fry, and in the Glass Belly strain, the fry are often visible in the mother’s abdomen days before birth. This transparency makes them a favorite for educational breeding tanks, as you can witness stages of development without interference. Dense plants or breeder boxes are essential to protect fry from adult predation.
Stable, clean water is essential for Glass Belly Guppies to remain healthy and display their best activity levels. Maintain a pH between 6.8 and 7.8, with moderate to high hardness for strong bone and scale development. Keep temperature between 22°C and 28°C, avoiding sudden shifts. Perform weekly water changes of 25–30% and ensure filtration provides gentle water movement. Live plants and floating cover help reduce stress and enhance natural behavior.
Potential health concerns include fin rot, ich, velvet disease, and bacterial infections if water quality is neglected. Due to selective breeding, some Glass Belly lines may be slightly more sensitive to poor conditions compared to standard guppies. Overfeeding and fatty diets can lead to swim bladder disorders, while sudden temperature drops can suppress immunity.
Peaceful and sociable
Glass Belly Guppies are gentle, lively, and endlessly fascinating to watch. They spend most of their day exploring the mid-to-top levels of the tank, darting between plants, and occasionally resting near the surface. Their peaceful nature makes them excellent community fish. What makes them unique is their translucent abdomen, which allows you to see internal structures and even developing fry in pregnant females — a feature that draws both hobbyists and breeders.
The Glass Belly Guppy (Poecilia reticulata) is a selectively bred variety of guppy that showcases a rare and captivating trait — a transparent abdominal area. Originating from the wild guppies of South America, the strain has been refined by breeders worldwide for both ornamental and educational purposes. Their gentle temperament makes them suitable for peaceful community tanks, and their prolific breeding habits ensure a steady population for enthusiasts. Observing a pregnant female Glass Belly Guppy is particularly rewarding, as the fry’s eyes and body outlines become visible inside her body before birth. They are hardy, adaptable, and thrive in well-maintained aquariums with stable water parameters. Feeding them a protein-rich, varied diet will maintain their health and enhance fin coloration. For aquascaped tanks, their glassy bodies create a unique visual effect, as they blend subtly into the background while their fins shimmer in motion. With the right care, they live 2–3 years and continuously offer both beauty and intrigue to any aquarium setup.