Taxing Long Island
News12 New York
Download the App
Where to Watch
Local
Crime
Weather
beWell
The East End
Crime Files
Stony Brook Medicine

Necropsy confirms dead whale found in Newark Bay was a 44-foot endangered sei whale

Sei whales are an endangered species and the third-largest whale species, reaching 40 to 60 feet in length and up to 50 tons as adults, according to the stranding center.

Derek Callahan

Apr 18, 2026, 7:43 PM

Updated

Share:

More Stories

An endangered male sei whale found floating dead in Newark Bay in early April was 44 feet long and weighed an estimated 15 tons, according to final findings released after a necropsy.

The Marine Mammal Stranding Center and the Atlantic Marine Conservation Society said the whale, first reported April 9, underwent a necropsy on Thursday, April 16.

RELATED: Dead whale found in Newark Bay towed to Jones Beach for necropsy

RELATED: 50-foot whale found dead in Newark Bay moved to NY Harbor as experts plan recovery and necropsy

Officials said no food was found in the whale’s stomach, suggesting the animal had not been eating recently.

Multiple biological samples were collected for further analysis. The results will be posted on the Marine Mammal Stranding Center’s website when available.

The whale was buried on the beach after the necropsy.

Sei whales are an endangered species and the third-largest whale species. They can reach 40 to 60 feet in length and up to 50 tons as adults, according to the Stranding Center. The group said it has responded to four sei whales since 1978.

More Stories

Top Stories

00:57
LI12PMBIKEARREST_2026-04-19-12-03-55

Police: Valley Stream man head-butted officer during arrest tied to park bike incidents

01:45
today

Showers this morning; Freezing cold expected on Long Island Monday night

Grillo

Mother, daughter arrested in attempted robbery at Manhasset Macy’s

dwi arrest

Two women arrested under Leandra's Law in Suffolk County this weekend

developing copy

8 children between the ages of 1 and 14 are dead after a mass shooting in Louisiana, police say

00:46
LI12PMBRENTWOODFIRE_2026-04-18-12-26-16

Brentwood house fire leaves one person displaced

01:03
RTLIDrunkDrivingAwarenessVOSOTVO10pm_2026-04-18-22-28-06

Roslyn students hold 2nd annual Drunk Driving Community Awareness Walk

01:40
LI5PMJEREMYPROM_2026-04-18-17-12-52

Suffolk police help students find the right prom look without the cost

02:09
LI5PMDUCKSKEVIN_2026-04-18-17-13-35

New Duck's pitcher hopes to revive his baseball career on Long Island

02:03
Daycare Abuse MS 041726_2026-04-17-22-10-31

Exclusive: Northport day care owner responds to abuse allegations; former employees speak out

00:13
DCWhaleUpdate12p_2026-04-18-17-35-45

Necropsy confirms dead whale found in Newark Bay was a 44-foot endangered sei whale

00:20
55e50874-3fbc-4e34-a213-f483dfdd2781

Man charged with DWI, fleeing scene of Water Mill crash

01:29
LI12PMLINEWORKERS_2026-04-18-12-20-24

Long Island celebrates National Lineworker Appreciation Day

Serious crash in New Haven critically injures 2 people

Man seriously injured in 2-vehicle Medford crash

CREDIT: AP/HASSAN AMMAR

Iran closes Strait of Hormuz again over US blockade and fires on ships

00:14
Kid Window MS 041726_2026-04-17-22-17-01

4-year-old boy injured after falling out of second-floor window in Huntington Station

00:32
418GOTTISENTENCING_2026-04-18-13-15-30

Federal prosecutors say mob boss John Gotti's grandson's sentencing should not be impacted by kidney donation

00:51
Fire Return MS 041726_2026-04-17-22-15-39

Deer Park residents move back home after apartment fire

01:51
li5pmbolkevinbridge_2026-04-17-17-43-59

Emergency repairs underway on Smith Point Bridge ahead of beach season

02:51
LIEISHENHOW41726_2026-04-17-06-03-36_05-02-09,28

Police: Shooter in custody, teen victim believed to be second shooter at Eisenhower Park

App StoreGoogle Play Store

info

Newsletter

Send Photos/Videos

Contact

About Us

News Team

News 12 New York

follow us

Twitter

Facebook

Instagram

more resources

Optimum Corporate

Optimum Service

Advertise on News 12

Careers

Content Removal Policy

© 2026 N12N, LLC

Privacy Policy

Terms of Service

Ad Choices