Yes, zebra danios will eat shrimp if the shrimp are small enough to fit in their mouths. Adult cherry shrimp and Amano shrimp are generally too large to be swallowed, but baby shrimp (shrimplets) and smaller juvenile shrimp are fair game. In the wild, zebra danios naturally feed on small crustaceans, insect larvae, and worms, so hunting tiny shrimp is instinctive behavior, not a sign of aggression.
What Size Shrimp Are at Risk
The simple rule with zebra danios is: if it fits in their mouth, they will try to eat it. Newborn shrimplets from species like cherry shrimp (Neocaridina) are only about 2mm long, which is well within snacking range. Juvenile shrimp that haven’t yet reached full size are also vulnerable, though some fishkeepers report their juvenile Neocaridina surviving just fine alongside danios. The outcomes vary from tank to tank.
Fully grown cherry shrimp (around 2.5 to 3cm) are too large for a danio to swallow. Danios may chase or “annoy” adult shrimp, but the shrimp typically escape and hide. Amano shrimp, which grow to 4 to 5cm, are essentially too big for danios to bother in any meaningful way. Some fishkeepers successfully keep Amano shrimp and zebra danios together long-term, and their overlapping temperature preferences actually make them decent tank mates.
The Real Problem: Colony Growth
If you’re trying to breed shrimp and grow a colony, zebra danios will work against you. Even if every adult shrimp in your tank is safe, the danios will pick off newborn shrimplets before they have a chance to grow. A breeding colony of cherry shrimp can produce dozens of babies at a time, but danios are fast, active fish that patrol all levels of the tank. They will find and eat shrimplets that aren’t hidden.
Some fishkeepers report maintaining a shrimp population alongside danios for years, with enough babies surviving to replace natural losses. But this only works with dense plant cover and plenty of hiding spots. In a sparsely decorated tank, danios can wipe out an entire generation of baby shrimp. If your goal is to maximize shrimp reproduction, zebra danios are not a compatible choice.
How Different Shrimp Species Fare
Cherry shrimp (Neocaridina) are the most commonly kept dwarf shrimp, and they’re also the most vulnerable. Adults survive fine, but the tiny babies are easy prey. If you’re keeping cherry shrimp with danios, expect lower survival rates for each batch of shrimplets compared to a fish-free tank.
Ghost shrimp are slightly larger than cherry shrimp, but multiple fishkeepers have reported danios “destroying” ghost shrimp. One common account describes giving away zebra danios specifically after watching them attack ghost shrimp. Ghost shrimp are also more fragile and slower to reproduce than Neocaridina, making losses harder to recover from.
Amano shrimp are the safest option. Their larger adult size puts them well outside the danio’s capability, and their temperature preferences overlap nicely. Amano shrimp prefer slightly cooler water, which suits danios better than many tropical fish. The trade-off is that Amano shrimp don’t breed in freshwater, so you can’t grow a colony regardless of tank mates.
Tank Setup That Helps Shrimp Survive
If you’re committed to keeping both zebra danios and shrimp in the same tank, the setup makes a significant difference. Dense plant cover, especially fine-leaved plants like java moss, guppy grass, or subwassertang, gives shrimplets places to hide where danios can’t easily reach. Moss clumps are particularly effective because baby shrimp can crawl deep into the tangle while danios are too large to follow.
Hardscape with small crevices also helps. Rocks, driftwood with holes, and ceramic shelters create zones where shrimp can retreat. The more visual breaks and hiding spots in the tank, the better the odds that at least some shrimplets survive to adulthood. A bare or minimally decorated tank gives danios an enormous advantage.
Tank size matters too. In a 10-gallon tank, danios will cover every inch quickly. In a 20-gallon or larger tank with heavy planting, shrimp have more room to establish safe zones away from the danios’ main swimming paths. Danios tend to occupy the middle and upper water column, so shrimp that stay near the substrate and in plant cover are less likely to be harassed.
Keeping Danios Well-Fed
A well-fed danio is slightly less motivated to hunt, though no amount of feeding will completely suppress the instinct to grab a tiny moving creature. Feeding your danios two to three times daily with quality flake food, supplemented with frozen foods, keeps them occupied and reduces active foraging. That said, zebra danios are opportunistic. Even a full danio will snap up a shrimplet that swims past its face.
Keeping danios in groups of at least five or six also helps. When their school is large enough, they focus more on each other and less on harassing tank mates. Understocked danio groups are more likely to fin-nip and chase other inhabitants, including shrimp.
Safer Fish Alternatives for Shrimp Tanks
If shrimp breeding is your priority, several small fish coexist more peacefully with shrimp than zebra danios do. Celestial pearl danios (a related but much smaller and calmer species) are widely considered shrimp-safe for adult shrimp, and they’re less aggressive toward shrimplets. Otocinclus catfish are purely herbivorous and ignore shrimp entirely. Small rasboras like chili rasboras or pygmy corydoras are other options with tiny mouths and mellow temperaments.
Zebra danios are energetic, fast swimmers that actively explore the entire tank. That personality makes them fun to watch but problematic for shrimp keepers. If you already have danios and want to add shrimp, go with adult Amano shrimp for the lowest risk. If you want a thriving cherry shrimp colony, the danios need their own tank.