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Last update: 2026-09-15

David Shiffman, Ph.D. 🦈

whysharksmatter.bsky.social

I am a marine conservation biologist studying sharks and a science writer. Posts are about science and the environment, science communication, and more! He/him

Reported Followers

172,396

7 days:559

14 days:1,357

30 days:2,893

Reported Followers by date

2026-09-14:172,39684

2026-09-13:172,31293

2026-09-12:172,21982

2026-09-11:172,13756

2026-09-10:172,08191

2026-09-09:171,99087

2026-09-08:171,90366

Actual Followers

94,093

7 days:1,696

14 days:2,954

30 days:4,751

Actual Followers by date

2025-11-21:94,093230

2025-11-20:93,863278

2025-11-19:93,585242

2025-11-18:93,343279

2025-11-17:93,064223

2025-11-16:92,841211

2025-11-15:92,630233

Reported Following

1,551

7 days:1

14 days:4

30 days:6

Reported Follows by date

2026-09-14:1,5510

2026-09-13:1,5510

2026-09-12:1,5510

2026-09-11:1,5511

2026-09-10:1,5500

2026-09-09:1,5500

2026-09-08:1,5500

Actual Following

1,533

7 days:2

14 days:5

30 days:7

Actual Follows by date

2026-09-14:1,5330

2026-09-13:1,5330

2026-09-12:1,5330

2026-09-11:1,5331

2026-09-10:1,5320

2026-09-09:1,5320

2026-09-08:1,5321

Blocking others

3,775

7 days:7

14 days:22

30 days:47

Blocks by date

2026-09-14:3,7750

2026-09-13:3,7750

2026-09-12:3,7751

2026-09-11:3,7741

2026-09-10:3,7731

2026-09-09:3,7722

2026-09-08:3,7702

Liking others

57

7 days:1

14 days:3

30 days:12

Likes by date

2026-09-14:570

2026-09-13:570

2026-09-12:570

2026-09-11:570

2026-09-10:570

2026-09-09:570

2026-09-08:571

Own posts

116,505

7 days:97

14 days:203

30 days:504

Posts by date

2026-09-14:116,5058

2026-09-13:116,4979

2026-09-12:116,4887

2026-09-11:116,48125

2026-09-10:116,45615

2026-09-09:116,44119

2026-09-08:116,42214

Likes earned

7 days:3,276

14 days:8,617

30 days:20,368

Likes by date

2026-09-14:151

2026-09-13:573

2026-09-12:271

2026-09-11:528

2026-09-10:551

2026-09-09:618

2026-09-08:584

Reposts earned

7 days:623

14 days:1,587

30 days:4,087

Reposts by date

2026-09-14:43

2026-09-13:76

2026-09-12:98

2026-09-11:94

2026-09-10:93

2026-09-09:108

2026-09-08:111

Top 5 Most Liked Posts (14 days)

1.

There’s a species of shark called the ninja lanternshark. It glows in the dark, like all lantern sharks. It’s called ninja because the scientist who discovered it was explaining her discovery to family at Thanksgiving and then her young cousin shouted “ninjas are cool, call it the ninja shark!”

2132

2.

I got invited to have my book featured in a Romantasy book club. My nonfiction book about shark behavior.

254

3.

I need to hear from you, the people: Which caption is funnier? “Rare image of shark stepping on a LEGO” or “Ahhhh something touched my foot!” (Or you could suggest your own funny caption, but those are a high bar to clear!) 📷 : Mike Coots

214

4.

If you’re harassing a wild shark and the shark bites you, please call David Shiffman Scientific and Environmental Consulting for a free consultation on why you should not have harassed a wild shark.

165

5.

PhD scientist here- this works better if you also have a clipboard

164

Top 5 Most Reposted Posts (14 days)

1.

There’s a species of shark called the ninja lanternshark. It glows in the dark, like all lantern sharks. It’s called ninja because the scientist who discovered it was explaining her discovery to family at Thanksgiving and then her young cousin shouted “ninjas are cool, call it the ninja shark!”

362

2.

Indigenous knowledge helps reveal the ties between reefs and mangroves news.mongabay.com/2026/09/indi... 🧪🌎🦑

50

3.

A few countries are doing this. But I need to stress that it will only happen for a tiny fraction of US scientists who have lost funding or jobs. There are not enough jobs in the rest of the world combined. The impact of Donald Trump and Elon Musk will not be science moving, but less science. 🧪

35

4.

Gray whales are washing up dead on the West Coast. The reason is alarming www.scientificamerican.com/article/gray...

34

5.

I need to hear from you, the people: Which caption is funnier? “Rare image of shark stepping on a LEGO” or “Ahhhh something touched my foot!” (Or you could suggest your own funny caption, but those are a high bar to clear!) 📷 : Mike Coots

33