Mixed breed or hybrid aquarium fish are produced when two closely related species cross-breed, either naturally in a shared tank or through deliberate selective breeding. Some of the most familiar hybrid fish in the hobby include the Parrot Cichlid, the Blood Parrot, and the Flowerhorn Cichlid, all of which were developed through selective hybridisation for their unusual body shapes and vivid colouring. Natural hybrids also occur among livebearers such as guppies, mollies, and swordtails, which can readily interbreed when housed together, producing offspring with varied fin shapes and colour patterns.
Hybrid fish can display a wide range of appearances and temperaments depending on their parent species, and they often exhibit hybrid vigour — a tendency towards robust health and faster growth than either parent line. However, they are generally not suitable for breeding programmes aimed at maintaining pure species lines, and many aquarium societies discourage their sale alongside pedigree stock. For casual fishkeepers, mixed breed fish can be excellent and characterful aquarium inhabitants, offering unique appearances and interesting behaviour at competitive prices. As with all aquarium fish, their care requirements depend on the parent species involved, so researching the likely traits of both parent breeds — water chemistry preferences, diet, tank size, and compatibility with other fish — is important before purchase.
Other/Mixed Breed
These are home-bred fish, ranging in size from 6 to 9 cm. I also have several varieties of angelfish.
4Other/Mixed Breed
Due to an upcoming move we sadly have to downsize and the tanks need to go. These are large specimens, A pacu around 30cm £80 clown knife fish around 35-40cm £125 2 x bush fish one is around 10cm and
11Other/Mixed Breed
Axolotl Needs larger tank soon Comes with tank, pump, tank accessories and food bacteria liquid and tap water dechlorinator. Please only enquire if you’re really interested. I get asked a lot if
1Other/Mixed Breed
Young yellow tiger guppies, born this spring. Selling some as there are already too many of them for our aquarium)
4Other/Mixed Breed
Fish tank with everything including with fish. Have a good filter thermostat and leds also goes with the cabinet . Im selling this because im looking for a crested gecko. Ipswich Happy to answer eve
42Other/Mixed Breed
🔥🐠 JUWEL 190 LITRE AQUARIUM – COMPLETE SETUP WITH HEALTHY FISH – £300 🐠🔥 💥 BARGAIN PRICE – £300 FOR THE LOT! 💥 Looking for a large, established aquarium without the hassle and expense of start
61Other/Mixed Breed
Selling my fish tank Fish : X2 albino Hoplo catfish/ Pearl Gourami/ X5 terta / Male guppy X2 dwarf pufferfish/... Tank: Built in filter and lights change from white to blue / Heater / All water tes
13Other/Mixed Breed
Healthy, active and well cared for ✅🐟 GUPPIES • Magenta Red Tiger - £10/ pair • Yellow Tiger - £10 / pair • Metal Black - £5 / pair • Koi Guppy - £5 / pair • blue panda - £5/ pair • Blue / Red Lace
2Other/Mixed Breed
Gorgeous silver/blue mosaic fan tailed guppies, not yet sexed at 4.5 weeks old, looking to sell in batches of 10 in Suffolk…
21Other/Mixed Breed
X6 Endler Guppies for sale. Bought these at the beginning of the week not realising one of our other fish was about to have fry! £1 each. Collection from CO12 area
42Other/Mixed Breed
Open for ANY offers Selling my Fluval 168 litre aquarium with matching cabinet, fully established and running. Includes: • Upgraded Fluval 407 external filter (high-performance filtration) • Built
9Other/Mixed Breed
Axolotl babies for sale. Parents are pictured, leucistic male and wild type female. Healthy clutch, feeding on frozen bloodworm and artemia (brine shrimp) Interesting morphs and markings starting to b