Entanglement of cetaceans in fishing gear remains a principle concern for fishers, marine managers, and conservationists globally. Bycatch in commercial fisheries is probably the most important single threat to many populations of small cetaceans worldwide. The technology exists to reduce the risk of bycatch, but whilst acoustic deterrents (pingers) have been shown to effectively reduce bycatch of small cetaceans in fishing gear, particularly gill nets uptake has been low (Larsen et al 2013). Until now, the uptake of these technologies by the fishing industry has been limited due to issues surrounding their cost, durability and ease of use.


Fishtek have listened carefully. For the past 8 years, our team of skilled engineers, scientists, fishers and conservationists have worked collaboratively to overcome these operational issues and we are excited to be able to offer the first low cost, durable, and practical acoustic deterrent that effectively prevents marine mammal bycatch: The Banana Pinger. Banana Pinger has three variations designed to alert whales, dolphin and porpoise. To make sure you select the right pinger for your needs, use our .

Optimised pings! The Banana Pinger acoustic output meets both EU and US regulations so pingers can be spaced at 200m. The ping production has been optimised to prolong battery life. Each ping reaches a source level of 145dB with a randomised structure, including harmonics. During recent sea trials the detection rate of porpoises around nets with Banana Pingers attached was reduced by 82-100%. These long-term studies showed no evidence of habitutation as well as being highly effective at keeping dolphins away.

The easiest to use pinger*! The pinger unit can be swapped with a spare unit with a fresh battery so that the battery can be changed in a dry place – no untying required! The immersed weight in water is 37g (compared to immersed weights of up to 120g for other pingers on the market) so it can be threaded onto the ropes joining net panels on either head or foot rope without interfering with the set of the net. *It’s no accident the pinger is shaped like a banana! We have engineered the casing to ensure that when the pinger comes back on-board it doesn’t get caught on the rails – the banana shaped casing means the pinger rotates smoothly over the rails on hauling preventing snags and subsequent downtime in fishing operations.


The Banana Pinger is the only pinger with a super-durable rubber carrier. The pinger unit has a depth rating of 1000m and has been tested to below 1400m. Toughness means longer life, greater reliability and reduced costs.

The Banana Pinger is the most effective pinger to purchase and the cheapest to operate, with an expected lifespan of >5 years. Running costs are minimal with one standard C-cell battery required each year, costing €1, a total of €4.5 per km of net per year. Other pingers brands are between 2 and 5 times as expensive to buy and run.

The cetacean bycatch problem – urgent action is required.

It is estimated that 600,000 marine mammals are bycaught in fisheries each year and that fishing poses the single greatest threat to the survival of many marine mammal populations globally.

Read more below:

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Don’t just take our word for it, see what others have said!

Independent scientific studies have consistently demonstrated that when the banana pinger is attached to nets, detection rates of cetaceans around nets fall by between 82 and 100%. The most effective pinger available!

In addition to being cheap, durable, effective and easy to use, we have considered further the needs of fisherman and managers alike and built in simple, yet effective, technologies that make the Banana Pinger the market leader:


Indicator lights that let the fishers know when the battery will need to be replaced. The pinger has a bright LED light that flashes continuously and switches from a green flash to a red flash when a battery change is needed. The flash is visible in direct sunlight, but switches off once immersed in water to conserve battery power.


Lasts 1 year with average use of 50% of time in water and is cheap and easy to replace*. The pinger has an advanced sensor so that it reliably turns off when out of water. Pingers do not stay on when in contact with wet nets, such as net bins, further conserving battery life.


The replaceable C2 alkaline cell means that waste is minimal compared to lithium cells used by other acoustic deterrents. The highly efficient sound production produces a focussed acoustic field ensuring noise pollution is kept to a minimum.


The safest pinger! The low weight, rubber housing removes the risk of injury to fishermen. The absence of lithium batteries used in other acoustic deterrents removes the fire or explosion risk. The method of attachment avoids weakening net ropes and the robust construction means no broken pingers with sharp edges, even in the harshest of conditions!


The Banana Pinger has been designed to be fully compliant with both EU and US legislation regarding the use of acoustic deterrents as a means of bycatch mitigation.

*batteries are replaced by the user without having to order expensive replacements from suppliers/manufacturers – batteries are a standard C2 alkaline cell that can be brought at your local supermarket.

Buy Deterrent pingers

Porpoise & dolphin deterrent pinger (50-120kHz) – Space the pinger every 200m

For use globally. Seal safe.

  • Battery life  12 months with average use (50% immersion time)
  • Frequency  50kHz – 120kHz with harmonics
  • Advanced acoustics  randomised pings with harmonics, prohibits habituation
  • Seal Safe Transmits outside the audible range of seals (Source).
  • Dimensions  185mm x 52mm x 42mm
  • Weight (with battery)  229 grams
  • Sound level 145dB +/- 3dB @ 1m
  • Compliant with European legislation: EC 812/2004

Whale deterrent pinger (3-20kHz) – Space the pinger every 100m

For use globally

  • Battery life  1 month with average use (50% immersion time)
  • Frequency  3 – 20kHz with harmonics
  • Dimensions  185mm x 52mm x 42mm
  • Weight (with battery)  229 grams
  • Sound level 135dB +/- 3dB @ 1m

Porpoise deterrent pinger (10kHz) – Space the pinger every 100m

For use globally

Still unsure which Pinger you need?

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Pinger maintenance kit

Pinger Maintenance Kit

Maintain your acoustic deterrents by replacing the O-rings every two years or when needed. 5 x O-rings and silicon grease included.

Banana Pinger (spare)

Spare Banana

Fish with more than one net? Want to switch pingers between gear with ease to remain compliant? Buy our spare rubber carriers (bananas) and just slot the pinger units across in seconds. None of the hassle of untying and re-attaching pingers seen with other pinger models!