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Hydrozoa of the World Oceans

There are 2582 species of Hydrozoa that are commonly found in the World Oceans.

Information on the COI barcoding status of these species is presented in the table below.
MODE
A		 All available COI barcodes for this taxa group (collected from any ocean and/or without geo-referencing):
  • Of the 2582 total species, 497 of these species (19%) have COI barcodes (from this or any ocean).
  • There are a total of 4383 "any ocean" COI barcode records available for this ocean and taxa group.
  • All available taxa group COI barcodes will be included in the Mode A downloads.
    • MODE
    B    		 Regional COI barcodes for this taxa group (includes only those collected in the World Oceans region):
  • Of the 2582 total species, 497 of these species (19%) have World Oceans-collected COI barcodes.
  • There are a total of 4383 "World Oceans-collected" COI barcodes available for this taxa group.
  • In the map to the right, Red Stars show sampling locations of the COI barcodes in the Mode B download.
    • Uncoded
    Species    		 Of the 2582 total species in this region, 2085 species do not have any COI barcodes (from any region).

     Barcoding progress summary for the World Oceans region, out of a total of 2582 possible species:
    • There are COI barcodes for 497 species ( 19% coverage ).
      •
    • There are 12S barcodes for 49 species ( 1% coverage ). 
    • There are 16S barcodes for 728 species ( 28% coverage ).
    • There are 18S barcodes for 387 species ( 14% coverage ).
    • There are 28S barcodes for 324 species ( 12% coverage ).
    Change Region   [ World ] [ Arctic ] [ North Atlantic ] [ South Atlantic ] [ Southern Ocean ] [ Indian Ocean ] [ South Pacific ]
    [ North Pacific ] [ Baltic Sea ] [ Mediterranean Sea ] [ Australia subregion ]
    -----> Click here to go back to the Group Summary page. <-----


    Hydrozoa of the World Oceans
    MZGdb DATA FILES

    Database-Version:   v2025-m10-01    		 --->   Mode-A   <---

    COI barcodes = 4383
    12S barcodes = 78
    16S barcodes = 4396
    18S barcodes = 905
    28S barcodes = 514
    		 Mode-B

    Not Applicable

    B = A for "world"         		Mode-C

    COI records = 6308
    12S records = 116
    16S records = 5230
    18S records = 1276
    28S records = 723
    		 Mode-D

    Not Applicable

    D = C for "world"
    FASTA file (*.fasta) MZGdb fasta (mode-A)
    COI | 12S | 16S | 18S | 28S

    True "barcode" (species-only) data
    from ANY ocean     (mode-A)     		MZGdb fasta (mode-B)
    not applicable     		MZGdb fasta (mode-C)
    COI | 12S | 16S | 18S | 28S

    Genus-spp and species data
    from ANY ocean     (mode-C)     		MZGdb fasta (mode-D)
    not applicable
    Mothur-formatted
    Taxonomic Hierarchy file (*.txt)

    Paired with fasta file above    		 MZGdb Mothur (mode-A)
    COI | 12S | 16S | 18S | 28S

    True "barcode" (species-only) data
    from ANY ocean     (mode-A)     		MZGdb Mothur (mode-B)
    not applicable     		MZGdb Mothur (mode-C)
    COI | 12S | 16S | 18S | 28S

    Genus-spp and species data
    from ANY ocean     (mode-C)     		MZGdb Mothur (mode-D)
    not applicable
    DADA2 file (*.fastq)

    Single "fasta+taxa" DADA2 fastq file    		 MZGdb DADA2 (mode-A)
    COI | 12S | 16S | 18S | 28S

    True "barcode" (species-only) data
    from ANY ocean     (mode-A)     		MZGdb DADA2 (mode-B)
    not applicable     		MZGdb DADA2 (mode-C)
    COI | 12S | 16S | 18S | 28S

    Genus-spp and species data
    from ANY ocean     (mode-C)     		MZGdb DADA2 (mode-D)
    not applicable
    MZGdb v3.0

    "full format"

    go to
    Format Description    		MZGdb CSV (*.csv)

    Excel-friendly full format
    comma-separated-values    		 MZGdb CSV (mode-A)
    COI | 12S | 16S | 18S | 28S

    True "barcode" (species-only) data
    from ANY ocean     (mode-A)     		MZGdb CSV (mode-B)
    not applicable     		MZGdb CSV (mode-C)
    COI | 12S | 16S | 18S | 28S

    Genus-spp and species data
    from ANY ocean     (mode-C)     		MZGdb CSV (mode-D)
    not applicable
    PSV (*.psv)

    pipe-separated-values    		 MZGdb PSV (mode-A)
    COI | 12S | 16S | 18S | 28S

    True "barcode" (species-only) data
    from ANY ocean     (mode-A)     		MZGdb PSV (mode-B)
    not applicable     		MZGdb PSV (mode-C)
    COI | 12S | 16S | 18S | 28S

    Genus-spp and species data
    from ANY ocean     (mode-C)     		MZGdb PSV (mode-D)
    not applicable


    MZGdb Atlas [ database-version = v2025-m10-01 ];   html-date = 2025-Oct-27









    Mon Oct 27 02:10:49 PM EDT 2025