. . . "accepted"@en . . . "Baltic photic muddy sediment dominated by stable aggregations of unattached rigid hornwort (Ceratuphyllum demersum)"@en . "The habitat 'Baltic photic muddy sediment dominated by stable aggregations of unattached rigid hornwort (Ceratuphyllum demersum)' as defined under the HELCOM HUB classification system. For more information visit 'http://helcom.fi/baltic-sea-trends/biodiversity/helcom-hub/hub/aa-h1q4'."@en . . . "SDN:M23::AA-H1Q4" . "AA.H1Q4" . . . . . . . . . .