Save the Fish
Disposable diaper
Ocean trash guide

Disposable diaper: > 450 years to break down in the sea

Harm: 7/10

Disposable diaper: how long does it take to break down in the sea?

Estimated time to break down in the sea: > 450 years. Source: US Bureau of Safety and Environmental Enforcement (bsee.gov).

Disposable diaper: why is it harmful to the sea?

Plastic shell and absorbent gel break into microplastics.

Disposable diaper: does it really disappear?

No. Plastic breaks into smaller and smaller pieces, microplastics, that stay in the water and inside animals. NOAA says plastic may never fully go away.

Disposable diaper: how harmful is it compared with other trash?

Harm score 7 out of 10: lasts 4/4, toxic 2/3, wildlife 1/3. It ranks 8 of 31 on our list. This score is our own simple scale for comparing items in the game. It is not an official index.

Disposable diaper: what is it made of?

Material: Plastic. A typical one is about 22 cm long and weighs about 40 g.

Disposable diaper: what can I do?

Carry a bottle, a cloth bag and a box: every single-use plastic you refuse is one less in the sea.

Disposable diaper: what lasts longer, and what breaks down sooner?

Lasts longer: Face mask, Plastic bottle, Toothbrush. Breaks down sooner: Plastic cups and plates, Plastic straw, Plastic cutlery.

Disposable diaper: where does this figure come from?

From “Marine Debris Timeline of Biodegradation”, Florida Department of Environmental Protection (Northwest District), information sourced from the US Environmental Protection Agency Gulf of Mexico Program. Checked on 2026-10-03.

The source's limits (in English): Approximate times printed on an educational poster. Real breakdown depends on sunlight, temperature, oxygen and microbes; plastics fragment into microplastics rather than disappear.

Open the source ↗ · Archived copy

Protect the fish from it, in the game

In Save the Fish you draw bubble walls to stop this trash from hurting fish and corals.

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