Marine Mammal Stranding Center
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To Report a Stranding: Call our 24 hour hotline (609)-266-0538

Marine Mammal Stranding Center

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Cetacean Stranding Data

 This page provides an overview of cetacean strandings in New Jersey from 2002 through present. This page is updated as new information becomes available, so please make note of the date on each graph. We thank you for your patience.

MMSC's Large Whale and Dolphin Response Efforts

The Marine Mammal Stranding Center continues to be on the front line as the first responders during the recent increase in whale strandings that began in December 2022.  As a member of the Greater Atlantic Marine Mammal Stranding Network, we are the boots on the ground working together with our fellow network members to help find the answers. The work that we perform is the first step in many that will bring us closer to understanding why we are seeing so many whale strandings along the East Coast. 


Stranding organizations such as ourselves perform the necropsies and collect any tissue samples that are viable based on the condition of the carcass. Once we have collected the samples, they are sent to the laboratory pathologists who are responsible for processing and analyzing. When the pathologists have completed their work, the scientists who are tasked with researching the ongoing Unusual Mortality Event (UME) interpret the findings.

  

This is not the first UME investigation that the Marine Mammal Stranding Center has been involved with. In the summer of 1987, hundreds of bottlenose dolphins washed ashore in New Jersey, as well as along the rest of the East Coast. After several months of necropsies and sample collection, the cause was found to be a virus that had spread through the population. A similar event occurred in the summer of 2012, which was again found to be a virus.

NJ WHALE STRANDINGS BY SPECIES AND YEAR SINCE 2022

NJ DOLPHIN/PORPOISE STRANDINGS BY SPECIES & YEAR SINCE 2022

Necropsy information December 2022 through present

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Images may be used by the media only with provided captions and photo credits

Humpback whale necropsy on December 23, 2022 in Atlantic City, NJ (photo-John Munroe)

    How can I help New Jersey's whales & dolphins?

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    CETACEAN STRANDING FAQS

    What is the Marine Mammal Stranding Center’s role?

     The MMSC is a member of the Greater Atlantic Marine Mammal Stranding Network, so we are on the front lines working together with our fellow network members to help find the answers to marine mammal deaths. We are tasked with being the first responders to facilitate a necropsy to collect any samples that are viable based on the condition of the carcass. Large whale necropsies can take a day or more to complete. The work is grueling and dangerous, requiring a large team of people, each with a specific task, working together as safely and efficiently as possible to complete the examination. When a large whale washes ashore in the Northeast region, oftentimes staff from other stranding organizations will travel in from out of state to assist with the efforts. 


    Once stranding organizations such as ourselves have collected the samples, they are then sent to the laboratory pathologists who are responsible for processing and analyzing. When the pathologists have completed their work, the scientists who are tasked with researching the ongoing Unusual Mortality Event (UME) interpret the findings.

    Why don't you push live cetaceans back out into the ocean?

    It is never recommended for the public to push a stranded animal back into the water. The risk of injury is high, as thrashing dolphins can cause serious injury, and potentially carry zoonotic diseases that can be transferred to humans. Not only is it dangerous for untrained individuals to attempt this, but these animals strand for a reason, and only pushing them back out into the ocean will prolong their suffering and any medical attention they might need. These animals are likely to re-strand in a different location and in a worsened condition. 


    The impact of stranding is life-threatening to cetaceans, as they are not anatomically designed to survive on land. Being evolved to live life in the ocean, their body weight and organs are supported by the water around them. When a cetacean is stranded for any length of time, their weight causes damage to their internal organs. Additionally, their skin becomes easily dried out and the animals begin to overheat. They are unlikely to survive even if they are refloated. Euthanasia is often deemed the most humane way to end suffering when the animals are found in poor body conditions due to being stranded.

    Additional Information

    The following resources are available from NOAA:
    Greater Atlantic Region stranding NetworkNecropsy FAQNOAA Fisheries media teleconference on East Coast whale strandings- TranscriptHumpback Whale UME 2016-2023 (active)Bottlenose Dolphin UME 2013-2015 (closed)

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