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Bristlenose Plecos (Ancistrus sp.)

Bristlenose Plecos (Ancistrus sp.)

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Size: Juvenile

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$6.00

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Description
Freshwater Fish

Bristlenose Pleco

A compact, algae-demolishing armoured catfish with a brown-grey spotted body and distinctive tentacle-like bristles on the snout. The most practical Pleco for community and planted tanks -- stays under 6 inches and earns its keep every day.

Brown-Grey with White Spots Tentacle Bristles on Snout Ancistrus sp. pH 6.5–7.5 4–6 Inches at Maturity Shrimp Compatible with Caution

Bristlenose Plecos (Ancistrus sp.) are the most widely recommended Pleco species for community and planted tanks, and with good reason. Where Common Plecos grow to 12 to 24 inches and eventually outgrow all but the largest aquariums, Bristlenose Plecos reach a manageable 4 to 6 inches at full maturity -- small enough for tanks as modest as 20 gallons, hardy enough to thrive in a wide range of conditions, and effective enough as algae grazers to make a measurable difference on glass and hardscape within days of introduction. The common name comes from the tentacle-like fleshy bristles that develop on the snout and around the head of adult males, and to a lesser extent in females -- a feature that gives the fish a distinctive, immediately recognisable face unlike any other commonly kept species. They are peaceful, nocturnal, low-maintenance, and one of the most genuinely useful fish available for a planted aquarium.

6.5–7.5pH
3–15GH (dGH)
72–82°FTemperature
4–6 inMax Size

Bristles, Armour & Sucker Mouth

Brown-grey armoured body with white to yellow spots distributed across the plates. The Bristlenose Pleco body is covered in bony scute plates in a warm brown-grey base with white to pale yellow spots distributed across the surface. The spotting pattern varies between individuals and provides natural camouflage against wood and stone. The body is stockier and more compact relative to length than Common Plecos, with a broad, flat head and a large sucker mouth on the underside used for rasping algae from surfaces. Tentacle-like bristles on the snout and head of adult males -- the defining feature of the species. Adult male Bristlenose Plecos develop fleshy, branching tentacle-like growths on the snout and around the front of the head. These bristles are most prominent in males, where they can be quite elaborate, and are reduced or absent in females. The bristles develop progressively as the fish matures and are fully expressed by 12 to 18 months of age. They are the easiest visual sexing indicator and the feature that makes the species immediately recognisable. Stays under 6 inches -- a genuinely nano-compatible Pleco. The manageable adult size of the Bristlenose is its most important practical advantage over other Pleco species. A 20 to 30-gallon planted tank can comfortably house one Bristlenose indefinitely. A 40-gallon tank comfortably supports two. There is no outgrowing the tank scenario that makes Common Pleco ownership complicated long-term. Primarily nocturnal -- most active after lights-out, but becomes bolder over time. Bristlenose Plecos are most active in the hours after lights-out, emerging from hides to graze extensively through the night. In a well-established tank with plenty of hides and consistent feeding they become progressively bolder and are frequently visible during daylight hours, particularly at feeding time and in the hours just after the light cycle begins.

Diet, Setup & Requirements

Outstanding algae grazer -- one of the most effective freshwater fish for glass and hardscape cleaning. Bristlenose Plecos rasp algae from glass, driftwood, stone, and plant surfaces continuously and thoroughly. A single Bristlenose in a moderately lit planted tank will keep the glass noticeably cleaner with minimal manual intervention. They are particularly effective at removing the soft green and brown algae films that accumulate fastest in established tanks. Driftwood should be provided -- an important dietary component. Like all Plecos, Bristlenose benefit significantly from access to driftwood, which they rasp for cellulose and biofilm. Driftwood is not strictly essential for short-term health but is strongly recommended for long-term digestive health and natural behaviour. Provide at least one piece of driftwood sized appropriately for the tank. Supplement with algae wafers, blanched vegetables, and sinking pellets. In most tanks natural algae growth alone is insufficient to fully meet the nutritional needs of a Bristlenose. Supplement every 1 to 2 days with high-quality algae wafers, sinking catfish pellets, and blanched vegetables including zucchini, cucumber, spinach, and carrot. Remove uneaten vegetables after 24 hours to protect water quality. Provide caves and hides -- territorial and requires daytime shelter. Bristlenose Plecos are territorial and strongly prefer a dedicated cave or shelter for daytime resting. PVC pipe sections, Cholla Wood hollows, or purpose-made Pleco caves all work well. In a tank with multiple Bristlenose ensure sufficient separate territories to prevent persistent chasing and aggression between individuals.

Generally Safe with Caution

Adult Neocaridina shrimp are generally safe -- shrimplets are at moderate risk. Bristlenose Plecos are not predatory fish, but they are large enough to consume shrimplets encountered during nighttime foraging. Adult Neocaridina at full size are typically ignored. In a planted tank with dense Java Moss and Subwassertang, shrimplet survival rates are adequate for maintaining a breeding colony alongside a Bristlenose. In a sparse or heavily grazed tank shrimplet survival will be lower. Do not keep with Caridina shrimp in a soft-water active-substrate setup. The Bristlenose's preference for pH 6.5 to 7.5 and moderate hardness does not align well with the very soft, low-pH conditions of a Caridina tank. For Caridina setups, Chili Rasboras or Cardinal Tetras are better-suited fish options. Plant leaves are safe -- Bristlenose do not consume healthy plant tissue. Unlike some larger Pleco species that damage or consume aquatic plants, Bristlenose Plecos graze only algae and biofilm from plant leaf surfaces. They do not damage healthy plant tissue and are fully compatible with planted aquariums of all styles.
Keeper's Note

The Bristlenose Pleco is one of the most consistently useful fish in the freshwater hobby at any tank size. It keeps glass cleaner than any other single animal available, it stays small enough for tanks where a Common Pleco would be impractical, it lives 5 to 8 years in good conditions, and the bristle development of an adult male is genuinely interesting to observe up close. A single Bristlenose in a 30-gallon planted Neocaridina tank is a low-maintenance, high-value addition that earns its keep every day without demanding special care or significant tank resources.

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Before you order · Fish

Policies & Disclaimers

What to expect from your fish, overnight shipping requirements, and what to do when your order arrives.

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Choose overnight (next day air) shipping for fish. Our Live Arrival Guarantee does not cover fish shipped by 2-day, standard expedited or ground service. Overnight shipping is a condition of coverage; the claim deadline and documentation requirements below also apply.

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Fish size and appearance vary by species, age and individual. Refer to the listing and selected option for any stated purchase size. Adult or maximum sizes in care information describe growth potential, not a guaranteed size on arrival. Photos represent the species or variety rather than the exact fish you will receive.

Color & settling in

Color and markings can vary between individuals and with age, sex, lighting and aquarium conditions. Fish may look paler after shipping. Follow the species-specific acclimation and care guidance and provide stable water conditions. If a fish arrives dead or visibly distressed, document its condition and contact us promptly rather than waiting beyond the claim window.

Species needs & compatibility

Check the specific listing for adult size, temperature, water requirements, diet and recommended group size. A small shipping size does not mean a fish will stay small. Choose suitable tankmates and allow for adult growth; a community-fish label is not a guarantee of compatibility with every fish or invertebrate.

Pack contents & selection

The selected quantity identifies the number of fish ordered. A group does not by itself promise a breeding pair or particular sex ratio. Any explicit sex or selection offered in the listing applies to that selected option.

Juvenile appearance, growth & sex differences

Young fish may have less intense coloration, different proportions or less-developed fins than mature examples in photographs. Species, age, sex and social conditions can affect their appearance. Adult-size figures describe growth potential, not the size guaranteed in the shipping bag.

Plan housing around adult needs. A small pleco, for example, still needs the space and diet appropriate to its identified species as it grows. Use the listing’s stated species and selected option rather than a photograph alone to judge what you are buying.

Unless a listing explicitly offers a sex-selected option, a quantity pack is not a specified sex ratio or breeding pair. Where an explicit selection is offered, that selected option applies.

Shipping appearance versus concerning distress

Paler colors, hiding and a reduced initial appetite can occur after transport. These observations alone do not establish a covered loss. They also should not be used to dismiss a fish that appears to be struggling.

Photograph or record visible concerns such as loss of balance, persistent labored breathing, an obvious wound or a fish that appears dead while it is still in the original packaging. Include the label and packaging and contact us promptly within the two-hour reporting window. Report observations rather than guessing a diagnosis.

Do not wait for color or activity to improve before reporting an arrival concern. Coverage and resolution follow the full guarantee; this guidance does not add a new health guarantee or extend the claim window.

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Schooling fish should be housed with an appropriate group of their own species. The quantity options offered for purchase are not a statement that each option is a suitable permanent school size. Check the listing’s group-size guidance and the aquarium’s capacity.

Peaceful fish can still eat animals small enough to fit in their mouths, including shrimplets. Consider adult size, feeding behavior, water requirements and available shelter when choosing tankmates. No general community label guarantees compatibility in every aquarium.

Bottom-dwelling fish need food that reaches them; they should not be expected to live only on leftovers. Provide the species-appropriate diet and observe whether quieter fish are being outcompeted.

Acclimation & quarantine

Have a stable, cycled aquarium or suitable quarantine setup ready before the shipment arrives. Follow the acclimation instructions appropriate to shipped fish and the species; do not assume a single timed method is suitable for every shipment or bag condition.

Document arrival concerns before transfer under the guarantee’s instructions. Avoid adding shipping water to the established aquarium, and minimize unnecessary handling and disturbance during introduction.

Separate observation of new fish can help protect an established collection and make feeding and behavior easier to monitor. Quarantine is care advice here, not a newly added condition of claim eligibility. Do not medicate automatically without considering the species and the actual concern.

Bonus animals & your paid count

When inventory allows, our policy provides one bonus animal for every five ordered of the same species. Bonuses are discretionary and are not separately covered for refund or replacement. They count toward the total arriving alive when assessing whether your paid quantity was fulfilled.

For example, if you order 10 fish and receive 12, receiving 11 alive fulfills the paid count. If fewer than 10 arrive alive, the shortfall is assessed under the guarantee. Expected bonuses that were not included are not a paid-item shortage.

Checking quantities & reporting a short count

Check the actual animals received against your paid order quantity. For a suspected short count, the full policy calls for a clear counting photo showing all animals, the empty bag and the shipping label before they are introduced into an aquarium. Follow its counting instructions and contact us if you cannot document the count clearly.

Verified miscount claims are resolved with a refund for the missing paid animals under the current policy. A count made after release can be unreliable when animals hide among plants or hardscape.

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If the bag is leaking or damaged, photograph the leak or damage and wet packing before opening. Keep the original photographs and packaging. For cloudy water that prevents counting, take the original cloudy-water photo first and follow the full policy’s specific additional clear-container documentation instructions.

The guarantee contains restrictions on opening bags, acclimation and transfers. Review those instructions before taking action so the evidence needed to assess the claim is preserved.

Arrival problem? Document it promptly.

Email support@superiorshrimpaquatics.com within two hours of the carrier’s recorded delivery time, using the email address on your order.

  • Photograph the original sealed bag with the animals visible and countable.
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  • Document any bag damage or leakage before opening.
  • Report all arrival losses in your initial message.

Read the full guarantee for photo requirements, cloudy-water documentation and claim eligibility before opening or transferring animals. Approved claims are resolved under the options and conditions stated there.

Shipping & coverage limits

Fish must ship by overnight (next day air) service to qualify for the Live Arrival Guarantee. Fish shipped by 2-day, standard expedited or ground service are not covered. Selecting a non-overnight method waives guarantee coverage for the fish in that order.

The guarantee applies to the first delivery attempt. Redirection, pickup holds and carrier delays can affect eligibility under the full policy. Any product-specific coverage restrictions stated in a listing also apply.

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Live aquatic products can carry tiny hitchhikers or eggs despite inspection. Pest-free arrival is not guaranteed. We recommend quarantining new arrivals before introducing them into an established aquarium.

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