Species

Bandit cory care guide

Corydoras metae

The Bandit cory (*Corydoras metae*) is a peaceful, bottom-foraging catfish reaching an adult standard length of 5 cm. Native to the upper Meta River basin in Colombia, this social species requires a group of six or more. Tank setups should feature fine sand or rounded gravel, an open path to the surface for intestinal air breathing, and direct feedings of sinking omnivorous foods rather than relying on community leftovers.The Bandit cory (*Corydoras metae*) is a peaceful, bottom-foraging catfish reaching an adult standard length of 2 in. Native to the upper Meta River basin in Colombia, this social species requires a group of six or more. Tank setups should feature fine sand or rounded gravel, an open path to the surface for intestinal air breathing, and direct feedings of sinking omnivorous foods rather than relying on community leftovers.[1]

Bandit cory
Tank length
20 cm8 in
Group
6+
Temperature
22–26 °C72–79 °F
pH
6.5–7.5
Adult size
5 cm2 in
Lifespan
5–10 yrs

Bandit cory tank size

Plan for a tank base measuring at least 80 cm × 30 cm. Bandit corys are social bottom-foraging omnivores that need adequate floor space so the entire group can browse together. Furnish the aquarium with fine sand or clean rounded gravel, add cover, and keep feeding areas clear and accessible.Plan for a tank base measuring at least 31 in × 12 in. Bandit corys are social bottom-foraging omnivores that need adequate floor space so the entire group can browse together. Furnish the aquarium with fine sand or clean rounded gravel, add cover, and keep feeding areas clear and accessible.[1]

Keep an unobstructed route from the bottom to the water surface. Bandit corys possess a modified intestine that allows them to take in atmospheric air, so plants and decorative hardscape must leave clear vertical swimming lanes.Keep an unobstructed route from the bottom to the water surface. Bandit corys possess a modified intestine that allows them to take in atmospheric air, so plants and decorative hardscape must leave clear vertical swimming lanes.[1]

Bandit cory water parameters

Maintain water temperature between 22–26 °C, keep the pH within 6.5–7.5, and provide a general hardness of 5–12 dGH.Maintain water temperature between 72–79 °F, keep the pH within 6.5–7.5, and provide a general hardness of 5–12 dGH.[1]

Fish waste and uneaten feed release ammonia into the system. Ammonia is toxic to aquatic life and should not be detectable in the aquarium. Use an established biological filter to process waste, practice portion control to avoid excess food, and test the water whenever you observe changes in feeding appetite or normal behaviour.Fish waste and uneaten feed release ammonia into the system. Ammonia is toxic to aquatic life and should not be detectable in the aquarium. Use an established biological filter to process waste, practice portion control to avoid excess food, and test the water whenever you observe changes in feeding appetite or normal behaviour.[3]

Feeding Bandit cories

Feed Bandit corys a varied diet composed of sinking dry foods, sinking tablets, and small live or frozen items such as bloodworm and Tubifex. Supply meals directly to the fish twice daily in portions they can finish in roughly two minutes. Because they are dedicated bottom dwellers, monitor them during feeding to ensure sinking food reaches the substrate rather than being intercepted entirely by midwater tank mates.Feed Bandit corys a varied diet composed of sinking dry foods, sinking tablets, and small live or frozen items such as bloodworm and Tubifex. Supply meals directly to the fish twice daily in portions they can finish in roughly two minutes. Because they are dedicated bottom dwellers, monitor them during feeding to ensure sinking food reaches the substrate rather than being intercepted entirely by midwater tank mates.[1][2]

Do not expect these fish to survive on leftovers from other species or to clean aquarium waste from the bottom. They are foraging omnivores that require their own dedicated food supply delivered straight to their social group.Do not expect these fish to survive on leftovers from other species or to clean aquarium waste from the bottom. They are foraging omnivores that require their own dedicated food supply delivered straight to their social group.[1]

Bandit cory behaviour

Bandit corys are native to the upper Meta tributaries of the Orinoco system in eastern Colombia. They reach an adult standard length of 5 cm. A prominent oblique dark bar marks the rear body and ends cleanly at the base of the tail fin without extending onto the fin rays.Bandit corys are native to the upper Meta tributaries of the Orinoco system in eastern Colombia. They reach an adult standard length of 2 in. A prominent oblique dark bar marks the rear body and ends cleanly at the base of the tail fin without extending onto the fin rays.[1]

These catfish are peaceful and social, requiring a group of six or more fish of the same species. When moving around the tank, individual fish occasionally dart upward to swallow atmospheric air using their modified intestine. While this breathing behaviour is natural, it does not compensate for deficient oxygen or degraded conditions; persistent distress requires water testing and husbandry assessment.These catfish are peaceful and social, requiring a group of six or more fish of the same species. When moving around the tank, individual fish occasionally dart upward to swallow atmospheric air using their modified intestine. While this breathing behaviour is natural, it does not compensate for deficient oxygen or degraded conditions; persistent distress requires water testing and husbandry assessment.[1][3]

Exercise caution during tank maintenance and handling. The pectoral spines of Bandit corys can pierce human skin and catch during handling, so avoid gripping the fish directly with bare hands.Exercise caution during tank maintenance and handling. The pectoral spines of Bandit corys can pierce human skin and catch during handling, so avoid gripping the fish directly with bare hands.[1]

Bandit cory tank mates

Small, peaceful shoaling species make suitable companions if water conditions match, the tank offers ample space, and their schooling needs are respected. Midwater characins such as Small, peaceful shoaling species make suitable companions if water conditions match, the tank offers ample space, and their schooling needs are respected. Midwater characins such as neon tetrasneon tetras and active cyprinids like and active cyprinids like harlequin rasborasharlequin rasboras can swim in upper zones while corys forage on the substrate. can swim in upper zones while corys forage on the substrate.[1][9][10]

Zebra daniosZebra danios can also share the aquarium provided their fast swimming habits have sufficient room and you ensure sinking food drops past them to reach the corys. Similarly, peaceful can also share the aquarium provided their fast swimming habits have sufficient room and you ensure sinking food drops past them to reach the corys. Similarly, peaceful honey gouramishoney gouramis work well if the tank includes plant cover, open space, and matching water parameters for both species. work well if the tank includes plant cover, open space, and matching water parameters for both species.[1][11][12]

Avoid predatory and aggressive species. Large adult Avoid predatory and aggressive species. Large adult OscarsOscars can swallow small tank mates, while the aggression and predatory nature of can swallow small tank mates, while the aggression and predatory nature of Jack DempseysJack Dempseys present clear hazards. Additionally, avoid present clear hazards. Additionally, avoid Pea puffersPea puffers due to known fin-nipping habits and challenging community behaviour. due to known fin-nipping habits and challenging community behaviour.[1][6][7][8]

Usually fine together

Avoid with

Bandit cory health problems

White spot disease, or ich, is caused by a parasite that can trigger scattered white specks across the body, fin clamping, rubbing, and laboured respiration. Because the parasite can attack gill tissue without displaying obvious skin spots, seek a clear diagnosis rather than assuming every pale mark indicates ich.White spot disease, or ich, is caused by a parasite that can trigger scattered white specks across the body, fin clamping, rubbing, and laboured respiration. Because the parasite can attack gill tissue without displaying obvious skin spots, seek a clear diagnosis rather than assuming every pale mark indicates ich.[5]

To reduce the risk of introducing ich into your aquarium, quarantine all newly acquired fish for at least 30 days and never transfer wet maintenance equipment between separate aquariums.To reduce the risk of introducing ich into your aquarium, quarantine all newly acquired fish for at least 30 days and never transfer wet maintenance equipment between separate aquariums.[5]

Bacterial fin rot shows as red or blood-streaked fins alongside progressively frayed, receding edges. Substandard environmental conditions elevate this risk. Maintaining water parameters and addressing sources of harassment help reduce risk, though an isolated split fin alone does not constitute a bacterial diagnosis.Bacterial fin rot shows as red or blood-streaked fins alongside progressively frayed, receding edges. Substandard environmental conditions elevate this risk. Maintaining water parameters and addressing sources of harassment help reduce risk, though an isolated split fin alone does not constitute a bacterial diagnosis.[4]

Cotton-wool disease is a fungal condition that presents as fluffy pale growths on damaged tissues, often appearing following rough handling, physical injury, or environmental stress. To reduce risk, avoid sharp decorations, handle fish gently, maintain stable water conditions, and seek prompt identification, as bacterial mouth rot can look similar.Cotton-wool disease is a fungal condition that presents as fluffy pale growths on damaged tissues, often appearing following rough handling, physical injury, or environmental stress. To reduce risk, avoid sharp decorations, handle fish gently, maintain stable water conditions, and seek prompt identification, as bacterial mouth rot can look similar.[4]

Male or female?

Sexing becomes clearer as fish reach maturity. Adult female Bandit corys tend to grow noticeably larger, rounder, and broader across the body than adult males, an outline that becomes particularly obvious when females are carrying eggs.Sexing becomes clearer as fish reach maturity. Adult female Bandit corys tend to grow noticeably larger, rounder, and broader across the body than adult males, an outline that becomes particularly obvious when females are carrying eggs.[1]

Questions

How many Corydoras should be kept together?

Keep six or more fish of the same species together. Bandit corys are peaceful, social bottom dwellers that require a social group to forage and interact naturally across the aquarium floor.Keep six or more fish of the same species together. Bandit corys are peaceful, social bottom dwellers that require a social group to forage and interact naturally across the aquarium floor.[1]

Do Corydoras keep your tank clean?

No, do not rely on Bandit corys to clean the tank or survive on leftovers. They are bottom-foraging omnivores that require direct feedings of sinking dry foods, sinking tablets, and live or frozen fare.No, do not rely on Bandit corys to clean the tank or survive on leftovers. They are bottom-foraging omnivores that require direct feedings of sinking dry foods, sinking tablets, and live or frozen fare.[1][2]

Do Corydoras create a lot of waste?

Fish waste and leftover feed both contribute ammonia to the aquarium water. You can reduce risk and monitor conditions by using biological filtration, feeding measured amounts twice daily, and conducting regular water tests.Fish waste and leftover feed both contribute ammonia to the aquarium water. You can reduce risk and monitor conditions by using biological filtration, feeding measured amounts twice daily, and conducting regular water tests.[3][2][1]

How many times should I feed my Corydoras?

Feed your Bandit corys twice daily with small meals finished in about two minutes. Observe the fish eating at the bottom, adjust portions to actual intake, and check that sinking tablets or foods reach them rather than midwater feeders.Feed your Bandit corys twice daily with small meals finished in about two minutes. Observe the fish eating at the bottom, adjust portions to actual intake, and check that sinking tablets or foods reach them rather than midwater feeders.[2][1]

Do Corydoras prefer sand or gravel?

Provide fine sand or clean rounded gravel across the base of the tank. Bandit corys are bottom-foraging omnivores that browse the substrate, so plan for accessible feeding areas and adequate floor space for the entire social group.Provide fine sand or clean rounded gravel across the base of the tank. Bandit corys are bottom-foraging omnivores that browse the substrate, so plan for accessible feeding areas and adequate floor space for the entire social group.[1]

Sources

  1. Hoplisoma metae (Bandit Cory) — Seriously Fish. Accessed 2026-10-05.
  2. What to feed your fish — RSPCA. Accessed 2026-10-05.
  3. Ammonia in Aquatic Systems — UF/IFAS Extension. Accessed 2026-10-05.
  4. Frequently asked questions on treating sick fish — Practical Fishkeeping. Accessed 2026-10-05.
  5. Ichthyophthirius multifiliis (White Spot) Infections in Fish — UF/IFAS Extension. Accessed 2026-10-05.
  6. Astronotus ocellatus (Oscar) — Seriously Fish. Accessed 2026-10-05.
  7. Rocio octofasciata (Jack Dempsey) — Seriously Fish. Accessed 2026-10-05.
  8. Carinotetraodon travancoricus (Dwarf Puffer) — Seriously Fish. Accessed 2026-10-05.
  9. Neon tetra species profile — Seriously Fish. Accessed 2026-10-05.
  10. Harlequin rasbora species profile — Seriously Fish. Accessed 2026-10-05.
  11. Zebra danio species profile — Seriously Fish. Accessed 2026-10-05.
  12. Honey gourami species profile — Seriously Fish. Accessed 2026-10-05.

Written from the sources above. Not yet reviewed by an aquarist.

Data used by the planner
Temperature22–26AqAdvisor (aqadvisor.com), retrieved 2026-10-04; agrees with FishBase (fishbase.se), retrieved 2026-10-04 · medium confidence
pH6.5–7.5AqAdvisor (aqadvisor.com), retrieved 2026-10-04; agrees with FishBase (fishbase.se), retrieved 2026-10-04 · medium confidence
Hardness (dGH)1–15AqAdvisor (aqadvisor.com), retrieved 2026-10-04 · low confidence
OriginRio Meta basin, Colombiacurated-v0 (needs expert review) · low confidence
Beginner friendlyYescurated-v0 (needs expert review) · medium confidence
Care leveleasycurated-v0 (needs expert review) · medium confidence
Activitymoderatecurated-v0 (needs expert review) · medium confidence
Swimming levelbottomcurated-v0 (needs expert review) · medium confidence
Temperamentpeacefulcurated-v0 (needs expert review) · medium confidence
Nips finsNocurated-v0 (needs expert review) · medium confidence
Long finsNocurated-v0 (needs expert review) · medium confidence
TerritorialNocurated-v0 (needs expert review) · medium confidence
Lives in groupsYescurated-v0 (needs expert review) · medium confidence
Minimum group6curated-v0 (needs expert review) · medium confidence
Dietomnivorecurated-v0 (needs expert review) · medium confidence
Lifespan (years)5–10curated-v0 (needs expert review) · low confidence
Months to adult size12curated-v0 (needs expert review) · low confidence
Safe with plantsYescurated-v0 (needs expert review) · medium confidence