Where has the legion-nubbed horny sponge been recorded?

Halichondria sitiens occurrence evidence comes from 13,229 records in 4 countries and territories, from 1873 to 2024. Most records come from Canada.

• 13,229 records
• 4 places
• 33 years recorded
• Demospongiae 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 legion-nubbed horny sponge has been recorded

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