Aphanotorulus emarginatus
L011/L035 Red Fin Thresher Pleco (Aphanotorulus emarginatus)
L011/L035 Red Fin Thresher Pleco (Aphanotorulus emarginatus)
Low stock: 4 left
Couldn't load pickup availability
Remarks: The red fin thresher pleco (Aphanotorulus emarginatus) has become a fish of many names ever since its first classification in 1840. Scientists have reclassified it into multiple different genera throughout the years with the most recent update occurring in 2016 placing it in the Aphanotorulus genus. Amongst hobbyists, it has been known by a handful of different L-numbers depending on collection point with some overlapping; L011, L035, L108, L116, and L131. The fish we currently have were imported under the L-numbers L011 and L035 with their collection point being reported as the Rio Pará.
Plecos that accumulate so many L-numbers and have such debate around their classification tend to be ones that are very widespread in their native range. The red fin thresher pleco is subject to this phenomenon with it having populations throughout the Amazon. Arguments are still being had over whether the different populations that tend to have slight variation in color are the same species or not. As mentioned, there is some difference between collection points, but in general, red fin thresher plecos are tan in color with an orange or red tinge to the outer edge of the caudal (tail) fin. This flash of color alongside its leopard spot pattern makes this pleco a must have for Loricariid lovers.
The native range of the red fin thresher pleco is broad and varied, but all these habitats are similar in regards to water parameters with conditions being warm, soft, acidic, and heavily oxygenated even in areas of low flow. Replicating these conditions within the home aquarium will keep this species healthy, happy, and looking their best. Many large Loricariids tend to be territorial around other plecos, but the red fin thresher pleco is an exception. They are very peaceful and some have successfully kept them with plecos only a third of their size. On the subject of their size, red fin thresher plecos can get to an impressive 16” long. Such a big species that is also surprisingly active will need an aquarium no smaller than 150 gallons so it has plenty of swimming space and water volume to handle its waste output.
Feeding the red fin thresher pleco is very simple and straightforward. They are an herbivore leaning omnivore that will take almost any food offered, but do not seem interested in algae. Since red fin thresher plecos do not appear to rasp on wood, it is not required. While they do not need the presence of wood, this species, like most catfish, will need plenty of hiding spots which can come in the form of rock caves, pvc pipes, and larger flower pots. To handle their waste output and keep oxygen levels high, it is recommended to over filter the aquarium and add wave makers and/or bubblers as needed.
With such a relaxed demeanor, elegant pattern, and hardy nature, the red fin thresher pleco can make a great addition to almost any larger South American tank.
Animal Data
Animal Data
- Native to: South America
- Breeding: Wild-caught in Brazil
- Max adult size: 15-16"
- Diet: Herbivore
- Social behavior: Peaceful
- Care skill: Beginner
Tank Parameters
Tank Parameters
- Temp range: 76°F - 84°F
- pH range: 6.0 - 7.0
- TDS range: 15 ppm - 200 ppm
- Min Tank Size:
Shipping Info
Shipping Info
We provide premium next day air shipping at affordable flat rates to minimize transit time for the health of the fish.
| US Zone 1 | UPS Overnight | $39.99 |
| US Zone 2 | UPS Overnight | $49.99 |
| US Zone 3 | UPS Overnight | $59.99 |
| US Zone 4 |
UPS Overnight |
$69.99 |
| Puerto Rico, Hawaii, Alaska | UPS Overnight 1-2 Day Air | Starts at $89.99 |
| Canada | UPS Overnight -2 Day Air | Starts at $89.99 |
| Florida | UPS 1 Day Ground | $19.99 |
| Local pickup | Select at checkout | No charge |
| No overseas shipping | ||
Minimum order for all shipping is $50 for mainland US, $100 elsewhere. Saturday delivery available for an extra $30. Shipping to Alaska and Canada is not flat rate and can be subject to additional fees based on location.
Important order and shipping info
Allow 2-4 business days to process and pack your order. You will receive a notification when it actually ships. Order cancellations are subject to a 10% restocking fee. Order changes cannot be made. However, if you wish to add to your order within 24 hours, you may place a second order with a request to combine the shipments. We will do our best to accommodate, however once an order is packaged and sealed it cannot be reopened.
Your order is covered by our Healthy & Happy Arrival Guarantee.
Why buy from us?
Our Healthy & Happy Arrival guarantee
We've been packing and shipping live fish for over 50 years. When you buy from us, you get the healthiest stock and most experienced live fish shipping in the industry. So you know you won't be disappointed!
Will my fish look like the picture?
The majority of fish on our website will NOT look like their photos upon their unboxing. Fish change in appearance depending on many factors, including mood, age, gender, and social status. Fish will naturally lose color during shipping and may appear faded upon arrival. Pictures are used as examples only. Pictures may be of mature fish with full color or juvenile fish without color. We encourage you to research the species as much as possible prior to ordering in order to familiarize yourself with the various appearances they may take on. Many species have females that look drastically different to their male counterparts, and many juveniles will not have as much color (or different colors) as their adult forms. If you have questions about how the fish will look, please review their information and email us if you have any questions.
How do I know which fish can go together in my tank?
Research the product descriptions on our website and use Google search to help decide which fish can go together. PLEASE do your research and email us if you have any questions. Also, we have a very active Facebook group called Imperial Tropicals Fishkeepers where you can learn from knowledgable and experienced fishkeepers.
How do you ship live fish? Sounds risky!
We've been shipping live fish for over 50 years. we use specialized packaging and techniques to ensure their health. See how we do it.
How much does shipping cost?
We provide premium next day air shipping at affordable flat rates to minimize transit time for the health of the fish.
| US Zone 1 | UPS Overnight | $39.99 |
| US Zone 2 | UPS Overnight | $49.99 |
| US Zone 3 | UPS Overnight | $59.99 |
| US Zone 4 |
UPS Overnight |
$69.99 |
| Puerto Rico, Hawaii, Alaska | UPS Overnight 1-2 Day Air | Starts at $89.99 |
| Canada | UPS Overnight -2 Day Air | Starts at $89.99 |
| Florida | UPS 1 Day Ground | $19.99 |
| Local pickup | Select at checkout | No charge |
| No overseas shipping | ||
Minimum order for all shipping is $50 for mainland US, $100 elsewhere. Saturday delivery available for an extra $30. Shipping to Alaska and Canada is not flat rate and can be subject to additional fees based on location.
Important order and shipping info
Allow 2-4 business days to process and pack your order. You will receive a notification when it actually ships. Order cancellations are subject to a 10% restocking fee. Order changes cannot be made. However, if you wish to add to your order within 24 hours, you may place a second order with a request to combine the shipments. We will do our best to accommodate, however once an order is packaged and sealed it cannot be reopened.
Your order is covered by our Healthy & Happy Arrival Guarantee.
When will I get my order?
We need 2-4 days to select and pack your fish, you'll get a notification when it ships along with tracking info. It will arrive the next day or day after, depending on your location. See our Shipping Policy for full info.
What if my order is delayed? Will my fish be OK?
We ship hundreds of packages a week, and most are delivered without any issues thanks to our experienced team and premium air courier service. Our high-tech packaging is designed to sustain the animals a minimum of 2-3 days in the box, and in some cases longer, depending on the breed.
However, sometimes delays do occur. If this happens to your order, please document and contact us promptly following our inspection and documentation policies above in order to receive credit.
Can I change or cancel my order after it is placed?
Orders can be changed or cancelled within 24 hours, subject to a 10% restocking fee. Shipping is stressful for the animals and we cannot open boxes once they have been prepped and packed.
Can you hold my order until my tank is ready?
We can hold for a few days, but not beyond a week as inventory changes rapidly. Please only place your order when you know you will be ready to receive them.
What if my order is missing something?
First, please check the box and packaging thoroughly. If you are sure an item is missing please contact us immediately.
Do you offer pickup on local orders?
Yes! Just specify local pickup as your shipping option in checkout and we'll let you know when it is ready.
What if a fish I receive seems dead, sick or doesn't look right?
97% of our orders arrive without an issue. But if something goes wrong, no worries! You're covered under our Healthy & Happy Arrival Guarantee