# Michael Phelps vs. a shark

> Discovery’s shark special averaged over 5 million US viewers including 72-hour catch-up.

- Owner: Discovery Channel
- Kind: Campaign
- Sector: Sports
- Seed date: 2017-07-23
- Observed peak date: 2017-07-24
- Date basis: Observed peak within the documented measurement window; not an all-time maximum.
- Spread Score: 41 (Notable), v1.2
- Mechanics: Controversy, Response chain, Platform jump, Press loop, Real-world spectacle

## Summary

Discovery aired Phelps versus a simulated shark, then Twitter complaints reached press and CNN. Reports put its US audience above five million with catch-up. GDELT news counts peaked on July 24 within the measured window.

## Timeline

- 2017-06-15 — Discovery Channel (Press) — Discovery announced Phelps vs. Shark for its Shark Week opening night.
- 2017-06-28 — Discovery Channel (YouTube) — Discovery released a trailer billing Phelps versus a shark as a battle for ocean supremacy.
- 2017-07-06 — Nat Geo WILD / Ryan Lochte (YouTube) — Nat Geo WILD promoted rival SharkFest with Ryan Lochte joking about being second best.

The full timeline, metrics and sources are on the case page, or via the Pro API (https://howitspread.com/developers).

Canonical URL: https://howitspread.com/cases/phelps-vs-shark

Cite as: How It Spread (2026). “Michael Phelps vs. a shark.” Case HIS-01373. Spread Score v1.2: 41/100. Updated 2026-10-22. https://howitspread.com/id/HIS-01373