Variations
1 kinds · tap one for a closer look
Sunbleak
Peaceful and fast; keep in a large group in cool water.
- Sunbleak needs cool water and makes a lot of waste, while Cardinal tetra is tropical.
- They need different temperatures (4–22 °C vs 23–29 °C). No setting suits both.
- Sunbleak needs cool water and makes a lot of waste, while Serpae tetra is tropical.
- Only a narrow temperature range suits both: exactly 22 °C.
- Sunbleak needs cool water and makes a lot of waste, while X-ray tetra is tropical.
- They need different temperatures (4–22 °C vs 24–28 °C). No setting suits both.
- Only a narrow temperature range suits both: 21–22 °C.
- Only a narrow temperature range suits both: 21–22 °C.
158 species in our list are a good match.
Care and water
Behavior
Peaceful and fast; keep in a large group in cool water.
- cool
Food
Flake and small floating foods.
Tap a food to see what it is.
Male or female
Health
Common problems. Tap one to see the signs. This is a guide, not a diagnosis.
Breeding
Nest spawner · Easy
Female lays strings of eggs on plants; male guards them.
Group.
Pond with plants and stems.
Spring warming.
Strings of eggs on stems.
Fry eat plankton.
- Overcrowding
Where it lives in the wild
The story of the sunbleak
A small European surface shoaler sold as a pond fish. Reproduces freely in ponds.
Johann Jakob Heckel described this fish in 1843 as Squalius delineatus. It is a small shoaling cyprinid of quiet waters. Males guard eggs laid on plant stems.
First described by Johann Jakob Heckel in 1843. Named for 'delineatus' means 'outlined'.
- Males guard eggs laid in rings around plant stems.
- It is one of Europe's smaller cyprinids.
- It has a short lateral line.