Where has the harlequin brittle star been recorded?

Ophioderma appressum occurrence evidence comes from 370 records in 20 countries and territories, from 1884 to 2024. Most records come from United States.

• 370 records
• 20 places
• 66 years recorded
• Ophiuroidea 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 harlequin brittle star has been recorded

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