SKY7 was overhead Wednesday evening.
Video in the media player above is from a previous update
This is at least the seventh dead whale that has washed up along a Bay Area beach this year.
Giancarlo Rulli with the Marine Mammal Center told ABC7 after the initial on-air broadcast, the gray whale was an adult female that was first spotted deceased last week.
According to the California Academy of Sciences, the 39-foot-whale was spotted underneath a pier near the Phillips 66 Refinery in Rodeo making access difficult.
MORE: Rise in whale sightings in San Francisco Bay sparks concern
Rise in whale sightings in San Francisco Bay sparks concern
RELATED: More dead whales wash up in San Francisco Bay
They suspect the gray whale was possibly hit by a vessel.
The Marine Mammal Center said due to the advanced state of decomposition and location, a necropsy will not be performed. And the whale will be left to naturally decompose.
If you're on the ABC7 News app, click here to watch live