Description
Red Fin Flagtail Fish (Semaprochilodus taeniurus)
The Red Fin Flagtail is a stunning and active freshwater species, instantly recognisable by its bold silver body, striking vertical black stripes, and bright red/orange fins. Originating from the fast-flowing rivers of South America, this shoaling fish is a real showpiece, adding constant movement and colour to any large aquarium.
Growing up to 8–10 inches (20–25 cm), the Red Fin Flagtail requires a spacious tank of at least 300 litres and is best kept in groups of 5 or more, where their natural shoaling behaviour shines. On their own, they may become shy, but in numbers, they are confident, energetic, and display their best colours.
🌊 Behaviour & Temperament:
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Active midwater swimmers that bring life to the aquarium.
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Generally peaceful but may be territorial in smaller groups.
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Best kept with larger, peaceful community fish (avoid very small tankmates).
🍴 Diet:
Primarily herbivorous, the Red Fin Flagtail feeds on algae, plant matter, and biofilm in the wild. In the aquarium, they thrive on a diet of spirulina-based flakes, algae wafers, blanched vegetables (spinach, courgette, peas), along with some high-quality pellets and occasional frozen foods for variety.
⚡ Key Information:
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Scientific Name: Semaprochilodus taeniurus
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Common Name: Red Fin Flagtail, Red Finned Prochilodus
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Adult Size: 13-14 inches
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Tank Size: 400L minimum (larger for shoals)
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Temperature: 24–28°C
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pH: 6.0–7.5
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Compatibility: Ideal with large peaceful species (e.g., Severums, Silver Dollars, Geophagus, larger Tetras)
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Lifespan: Up to 10 years with proper care
The Red Fin Flagtail is a hardy, long-lived species that thrives in well-oxygenated tanks with open swimming space and strong filtration. With their shimmering silver scales and fiery fins, they make a breathtaking centrepiece in any large aquarium.
Click & Collect
Livestock will only be bagged once you arrive, or if you contact us in advance to request it ready beforehand.
Local Delivery
Order anything from our in-store range and have it delivered right to you.
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Minimum spend: £50
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Delivery up to 10 miles: £10
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Delivery up to 25 miles: £20
Distances are measured “as the crow flies”, not by road.
Once your order is placed, we’ll be in touch to arrange a suitable delivery date and time.
Please note, delivery may take a little longer as we often group orders together to build an efficient delivery run.
Important: If you’re ordering a large aquarium, please ensure someone is available to help unload the van on arrival.
Dry Goods Delivery
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DX Express: 1 working day, same-day dispatch before noon 0-75kg
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Express Pallet: 1–3 working days 75-500kg
If you'd like to add more items to an existing order that hasn't yet been dispatched, please place a Click & Collect order and leave a note asking us to combine the orders.
Please note: We currently only dispatch parcels Wednesday to Friday.
Pre-Order
Want the full details? Check out our Terms & Conditions.
Livestock Delivery
Thursday Delivery – £24
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Dispatched Wednesday afternoon
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Delivered Thursday before 1pm
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Order by Wednesday 12 noon
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Minimum spend: £50
Friday Delivery – £24
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Dispatched Thursday afternoon
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Delivered Friday before 1pm
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Order by Thursday 12 noon
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Minimum spend: £50
Saturday Delivery – £29
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Dispatched Friday afternoon
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Delivered Saturday before 1pm
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Order by Friday 12 noon
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Minimum spend: £50
📦 Want to Add to an Existing Order?
No problem! Just place a Click & Collect order and leave a note asking us to link it with your original one (as long as it hasn’t been dispatched yet).
🛒 Dry Goods Now Included!
You can now include dry goods in your livestock delivery – perfect for topping up supplies in one go.
❄️ Please note: We can’t send frozen food with livestock – please order frozen items separately.
⚠️ Delivery Exclusions
Unfortunately, we’re unable to deliver livestock to the following postcodes:
Scotland & Isles:
AB30–AB56, DD8–DD10, DG3–DG9, DG12–DG14, FK17–FK21, KA18–KA19, KA26–KA30, PA20–PA38, PA80, PH3–PH40
Cornwall Isles: TR21–TR25
All of the following postcodes are excluded:
BT, HS, IM, IV, JE, KW
Plus Channel Islands and Shetland Islands
Payment & Security
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