Discarded nylon fishing line takes around 600 years to decompose. Thin, transparent, and incredibly strong, it becomes an invisible hazard the moment it's left behind.
Why does it take this long?
Birds, fish, and marine mammals get entangled and cannot free themselves. Because it's nearly invisible in water, lost line keeps trapping wildlife for centuries — a phenomenon known as "ghost fishing." Anglers who leave line on banks and in water create traps that outlast their great-great-grandchildren.
Where it sits on the timeline
2 months
🍎 Apple core
20 years
🛍️ Plastic bag
600 years
🎣 Nylon fishing line
4,000+ years
🍾 Glass bottle
Greener alternative
Use a line recycling bin
Many fishing spots have monofilament recycling tubes. Biodegradable line options are also emerging for anglers.
See eco fishing gear →
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Frequently asked questions
How long does a nylon fishing line take to decompose?
A nylon fishing line takes approximately 600 years to decompose in nature.
Is fishing line recyclable?
Specialised monofilament recycling programs exist at many marinas and tackle shops — never leave line in nature.
Why is lost fishing line so dangerous?
It entangles animals invisibly and persists for centuries, continuing to trap wildlife long after it's discarded.