Larval Trap Aquatics

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If you have ever tried collecting fish larvae in an aquarium it is a time consuming tedious task, that will usually require you to stay up late at night after the lights go out with minimal results.

The Vossen Larval Trap is a very simple and easy to use for fish fry and larvae. The included suction cups will firmly affix the trap to the side of your aquarium while the air pump (not included) will create a gentle flow of water up and into the trap where the fry can be safely and efficiently moved to a larval system.


Dimensions: 6.5" T x  1.5" W x 7" L


Every year more and more people are learning how to breed the fish that are currently in their tank. The more we learn about how fish reproduce and how to raise them, the more sustainable, and successful the hobby will become. The Vossen Larval Trap has been designed to aid in the collection of larvae from the tank allowing a substantially higher yield of fry than other methods would allow with much less stress.


The included battery operated LED light will lure the fry into the trap where the gentle flow created by the bubbles will raise the larvae into the trap secluding them from predators and allowing easy transport to the larval system.



1. Insert the included suction cups into the larval trap.

2. Suction cup the larval trap on the side of your aquarium with the very top of the trap barely breaking the surface of the water. If the trap completely submerged it will allow fry to escape through the top.

3. Connect flexible airline tubing to rigid airline tube and place in the airline guide located in the entry path of the trap. The rigid airline tube should not extend past the bottom of the larval trap.

4. Connect flexible airline tubing to air pump and control valve (if needed)

5. Turn on the air pump and tune the flow rate to approximately 2 - 3 bubbles per second. Bubbles should not be escaping outside of the entry path into the larval trap.

6. Using clear tape, attach the included LED light to the outside of the aquarium. The LED light should shine into the entry path of the trap, luring larvae into the trap opening.


Whats Included:

1x Larval Trap

1x Battery powered LED light (battery included)

1x Rigid airline tube

2x Suction Cups


Note: Air pump and airline tubing not included.

More Information
UPC 012345210358
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Product Questions

What size tubing do I need to plug it into the air pump
Question by: Lawrence on Dec 20, 2022, 9:13 PM
Standard 3/16" airline tubing works with this product
Answer by: William Reed (BRS Staff) on Dec 30, 2022, 12:45 PM
Hi - does the included light come with an attached suction cup? I noticed the one I got doesn't have one. So that means I have to purchase the (3rd) suction cup separately? Thanks!
Question by: Phil on Jul 31, 2018, 8:38 PM
Great question. The LED lures no longer come with the suction cup. The LED can be taped to the tank to position it over the opening of the trap. We'll update the product to reflect this right away. Most people even substitute their own light source to replace the short lived battery powered LED that's provided. Have a great day :)
Answer by: Chad on Aug 1, 2018, 12:18 PM
Can this trap be used to collect baby shrimp?
Question by: Aaron on Apr 24, 2018, 8:55 AM
Thanks for checking with us. The larval trap can be used to collect shrimp larvae the moment that they hatch. You can also use the trap to collect crab larvae, and most fish larvae. The trap uses a light lure to bring the larvae to the trap opening, which sucks them into the holding compartment, ready for transfer to the larval tank. Most marine larvae are attracted to light when they hatch. Have a great day :)
Answer by: Bulk Reef Supply on Apr 24, 2018, 8:56 AM