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Bongo and CalVET nets

Double nets for vertical and oblique plankton sampling, allowing two simultaneous collections in the same water column.
The Bongo net pairs two identical nets laced onto a double frame with a single towing point, which reduces the disturbance caused by bridles. Each net has a cylindrical section at the mouth, followed by a cone leading to a screw-off collection bucket. You can mount two different mesh sizes or keep one sample in reserve. The CalVET is the version designed for quantitative vertical sampling. Filmar sews the nets in Nitex with 1000-denier Cordura bands at the mouth and tail, and offers complete kits: a stainless steel or aluminum double frame, V-Fin depressor, flowmeter and buckets. Widely used in oceanography, the Bongo is also well suited to lake surveys. The CalVET, also called PairoVET, is a double net for vertical tows. We make it in two formats. The most common format is a vertical bongo with a 40 to 60 cm opening, supplied as a kit with a spreader bar, cable and weight, like the one delivered in 2026 with 60 cm x 300 cm bags in 20 and 200 µm. The second follows the original CalCOFI program design for fish eggs: two 25 cm rings, a 1.5 m bag and 150 µm mesh.
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Features

Opening diameter 50 or 60 cm per ring as standard (63 cm offered); others upon request
Net length 150 cm (50 cm opening) or 250 to 300 cm (60 cm opening)
Shape Half cylindrical, half conical
Filter fabric Nitex, mesh of choice (e.g., 335 and 500 µm)
Frame Simplified 5/16-inch 316 stainless steel rod double frame, or aluminum double frame with swivel
Depressor 22 kg (49 lb) V-Fin with 1 m galvanized chain
Buckets Two large buckets with windows of the same mesh
Towing point Just one, with swivel shackle
CalVET large format Two rings of 40, 50, or 60 cm, bags from 200 to 300 cm, spreader bar, cable and ballast
CalVET large format, a delivered example Two 60 cm x 300 cm Nitex 20 µm bags and two 200 µm bags, four buckets, 30 kg stainless steel ballast
CalVET, CalCOFI design Two 25 cm rings (0.05 m² each), 1.5 m net (0.8 m cylinder and 0.6 m cone), 150 µm mesh
Vertical tow Descent and ascent of approximately 1 m/s, without a bridle in front of the opening, with lead weights under the net
Four services according to your schedule: rush, priority, regular or economy, at different prices. The turnaround time varies by season; ask us for the possible delivery date for your project.
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Made in Quebec
Lifetime warranty on all our products, against manufacturing defects
Lifespan of 5 years or more

A well thought-out net, from start to finish

Uses

• Oceanographic surveys (DFO, research institutes)
• Monitoring of ichthyoplankton and zooplankton
• Lake sampling with two filtration precisions
• Universities and environmental consultants

Options

• Simplified Ring Kit (2 nets, 2 buckets, 15 lb weight, stainless steel frame)
• MARMAP kit (2 nets 60 x 300 cm, V-Fin depressor, aluminum frame, flowmeter)
• 3-blade flow meter with reverse-flow stop
• Choke bands for a close-open-close mechanism
• Buckets with windows of the same mesh

Made in Saint-Fabien

Designed and sewn in our shop in Quebec, with the Filmar lifetime warranty against manufacturing defects.
Bongo and CalVET nets manufactured by Filmar
Scientific research file
Scientific research file

Made to measure?

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What our customers say

5-star Google reviews

See all reviews on Google

Très bon suivi des commandes, bons conseils, belle souplesse pour l’ajustement aux engins de pêche demandés

Michel L.
Avis Google

Partenaire de confiance depuis 8 ans ! Les Industries Filmar Inc. offre un service impeccable et des produits Nitex de très haute qualité. C’est toujours un plaisir de collaborer avec eux.

Jean-Carlos M.
Avis Google

Nous achetons des filets de dérives et des filets maillants de l’équipe Filmar depuis plusieurs années et nous avons toujours un service rapide et des produits fait main de qualité! Merci

Yannick B.
Avis Google

Une très belle expérience. Notre besoin était particulier et Francis à bien compris l’idée. Ses recommandations pour le type de filet et sa confection nous ont permis d’obtenir le résultats désiré. Merci à Filmar!

J’ai été très bien servie par l’entreprise Les Industries Filmar. Ma commande de filets maillants était juste à sa réception à nos bureaux et ils l’ont réalisée plus vite que le délai demandé. Je recommande fortement cette compagnie! Merci aux Industries Filmar!

Nadine M.
Avis Google

Partenaire de nos réussites, Filmar a toujours su répondre à nos besoins de fabrication de filets et de réparations sur nos engins de pêche scientifique. …

Charles T.
Avis Google

Amazing service! We purchased a plankton net and closing mechanism from Filmar on behalf of the Bamfield Marine Sciences Centre. Francis and his team were very professional and helpful throughout the process, and all the items were very high quality.

University Programs
Google review

High-quality products. We do have a few plankton nets from them and they don’t disappoint. The customer service is amazing with frequent updates and follow ups. Thanks!!

Delphine D.
Google review

Extra large, custom plankton nets built for us in record time. Thank you to the Filmar team for a great job!

Top quality custom made plankton nets and equipment, delivered in a timely fashion. I highly recommend Filmar Inc for your ocean sampling needs.

We order two plankton nets and they are high quality, well made and should serve us well in our sampling. Thank you

Shannon R.
Google review

I have had excellent results with Filmar. Ordered my third net from them – accurate quote, timely manufacture and delivery. …

Veronika B.
Google review

We’ve been using Filmar plankton nets for marine research across Canada over the last few years, and are extremely satisfied with the quality, durability, and customer service. Thanks!

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