ID-number for "unknown" to exclude from search?

How to I exclude “unknown” from my searches? Is there an extra ID number for that?

In order to customize my searches I am using the ID numbers for taxons, adding “&without_taxon_id=xxxxx,yyyyy,zzzzz” to the adress. Very helpful! But still I get a lot of “unknowns” that are mostly insects and land plants (which are both of no interest to a marine search).

Try adding &identified=true to the query string.

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Yes, perfect! Thank you!

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