Can I keep roach in a home aquarium?

No, roach grow too large and are far too active for standard home aquariums. They require a large garden pond or a massive, custom-built coldwater enclosure to thrive.

What is the difference between a roach and a rudd?

While similar, roach have a mouth that points slightly downwards (adapted for bottom feeding), whereas a rudd's mouth points upwards. Additionally, the front edge of a roach's dorsal fin is aligned directly above the pelvic fins, while on a rudd, the dorsal fin is set further back.

Do roach eat pond plants?

They are omnivorous and may nibble on soft, new plant growth or algae, but they are unlikely to destroy robust pond vegetation. Their diet is mostly invertebrate-based.

How fast do roach grow?

Roach are relatively slow-growing fish. In typical pond or wild conditions, it can take them several years to reach a weight of just one pound (450g).

Will roach breed in my garden pond?

Yes, provided the pond is large enough, has good water quality, and features shallow, heavily planted marginal areas where they can scatter their eggs in the spring.

FreshwaterTropicalIntermediate

Roach

Rutilus rutilus

The roach is a widespread and highly adaptable shoaling fish, celebrated as one of Britain's most quintessential native coarse species.

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Ideal Conditions

Temperature: 4 – 22 °C
pH range: 6.5 – 8.5
Hardness: 10 – 25 dGH
Adult size: 20 – 35 cm
Large garden pond: 1,500 litres+
Lifespan: 10 – 15 years
Diet: Omnivore
Water flow: low to moderate
Preferred setup: Spacious pond with planted margins and open swimming water

About the Roach

Found in nearly every river, lake, and pond across Europe, the roach (Rutilus rutilus) is a resilient staple of temperate freshwater ecosystems. Instantly recognisable by their flashing silver flanks and distinctive orange-red fins, they are an active schooling species that forms the backbone of both aquatic food webs and the recreational angling industry. Their adaptability allows them to thrive in varied habitats, provided the water is cool and oxygenated.

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Where Roach comes from

Native range

Europe, Western Asia

Countries / regions

United Kingdom, France, Germany, Poland, Russia

Habitat

Slow-flowing lowland rivers, canals, lakes, and reservoirs, favouring areas with aquatic vegetation.

Extremely widespread across the Palearctic region; introduced to several areas outside its native range where it can become invasive.

Similar species

Rudd
Scardinius erythrophthalmus
Common Dace
Leuciscus leuciscus
Chub
Squalius cephalus

We’re adding more full species guides as the catalogue grows.

Compatible tank mates

Reviewed guidance based on this species' recorded traits.

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Rudd
Scardinius erythrophthalmus
Occupy slightly higher water levels, share identical environmental requirements, and frequently shoal together in the wild.
Great
Tench
Tinca tinca
Peaceful bottom dwellers that will comfortably cohabit without competing directly for mid-water swimming space.
Great
Common Carp
Cyprinus carpio
Large carp can aggressively outcompete roach for food, requiring strategic feeding to ensure the roach receive their share.
Compatible with caution
Northern Pike
Esox lucius
Pike are apex predators that naturally prey on small-to-medium coarse fish like roach.
Not recommended
Goldfish
Carassius auratus
Excellent pond companions that thrive in the same cool, spacious environments without aggression.
Great

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