Where has the polydora mud worm been recorded?

Polydora cornuta occurrence evidence comes from 6,813 records in 17 countries and territories, from 1878 to 2025. Most records come from Netherlands.

• 6,813 records
• 17 places
• 72 years recorded
• Polychaeta class

Observation evidence passport

Compare this animal’s observation pattern

When it is recorded

Peak month: September. Records cluster in the months an animal is present and being looked for, so a summer peak can reflect observer effort as much as the animal.

Records over time

Recording effort has risen steeply almost everywhere since the 1990s, so a rising line usually shows more observers rather than more animals.

Where polydora mud worm has been recorded

The countries below show where occurrence evidence exists for polydora mud worm. They do not define a complete habitat range: survey effort differs by place, and historical or one-off records can appear alongside repeated presence.