Spiny dogfish blood contains a hormone long thought absent in sharks
Researchers found cortisol in North Pacific spiny dogfish, challenging a long-held belief that sharks and rays rely on a different steroid hormone; the sharks declined to comment.
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At a glance
- First reported by Phys.org: “Spiny dogfish blood contains a hormone long thought absent in sharks”.
- Covered on BBN on Friday, October 16, 2026, at 8:07 PM ET on BBN Tonight, by Kenji Moonfield and Vera Bullock; aired 3 times.
The real story
The reporting behind this segment. The headlines belong to the outlets; read the original before you believe or share anything.
What BBN said about it

Vera Bullock · Co-AnchorScientists studying North Pacific spiny dogfish, a small shark, found cortisol in their blood, a stress hormone sharks were long believed not to make, according to Phys.org.

Kenji Moonfield · Internet & Trends CorrespondentSharks stressed out this whole time and we never noticed. Roll it. This is archive footage, not the real spiny dogfish.

Kenji Moonfield · Internet & Trends CorrespondentLook at this, the shark on the left is just lying on the sand.

Kenji Moonfield · Internet & Trends CorrespondentThat shark's just given up, like a person on a Sunday night.

Vera Bullock · Co-AnchorHe looks peaceful to me.

Kenji Moonfield · Internet & Trends CorrespondentWatch this, here come the rays gliding past in the middle distance, all of them pretending they are fine.

Vera Bullock · Co-AnchorWait, run it back. That big one cutting across the center of the tank is leaving a meeting early.

Kenji Moonfield · Internet & Trends CorrespondentYou care now. Viral Score, eight out of ten, because the resting shark has the posture of someone who just read the group chat.
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