Golden Dwarf Sucker
Otocinclus affinis
Golden Dwarf Sucker (Otocinclus affinis) — Varies care, Peaceful, under Other. Minimum tank in the app: 10.6 US gal min; aim for 70–79°F and pH 6.5–7.5. The Golden Dwarf Sucker is a compact and engaging addition for those looking to maintain a vibrant mid-tank presence, particularly in smaller setups.

Captive lifespan reflects typical experience in a home aquarium, not maximum recorded age; genetics, sourcing, and care vary.
Natural distribution
Asia
- East & Southeast Asia
Regional colours match the stocking calculator’s origin map.
Golden Dwarf Sucker Tank Setup
Aim for a tank with a balanced combination of open swimming space and numerous hiding spots using plants or decorations to create visual barriers. A gentle water flow will suit their preference while maintaining stable pH (6.5 - 7.5) and temperature (21 - 26°C) is vital for their comfort and activity. Soft, sandy substrates are ideal to prevent damage to their delicate bodies.
What Do Golden Dwarf Suckers Eat?
This omnivorous species has a moderate feeding speed but can be overshadowed by faster feeders. Offering a varied diet including algae-based foods and finely crushed flakes can enhance their health and coloration while preventing competition-related stress during feeding times.
Golden Dwarf Sucker Tank Mates
Ideal companions are similarly sized, non-aggressive species that occupy the same mid-tank zone without competing for space or resources. Avoid pairing with overly boisterous or territorial fish that could harass the Golden Dwarf Sucker. Intraspecies aggression is minimal, allowing for solitary or small group setups without concern for dominance.
Are Golden Dwarf Suckers Good for Beginners?
Care demand varies with setup and individual fish; use the numbers above as your baseline. Aquarists often overlook the need for proper tank mates, leading to stress or aggression that can compromise the health of the Golden Dwarf Sucker. failing to provide adequate hiding spots can result in increased anxiety and reduced activity, hindering their natural behavior.
Building a community? Run the full list through the stocking calculator before you add anything else.
Log tests and reminders in App-aquatic—free, same data you see here.




