The fish data files are in a tab-delimited format.  The files have the following row and column definitions.  

Row Number	Column Name	Description
1		UDATE		Date file was last updated.  See USRCE for the
				 update source.
2		SNAME		Study Unit Name (4-letter abbreviation)
3		SNAME		Site Name
4		STAID		Station ID number
5		DATE		Colection date as mm/dd/yy
6		CTYPE		Sample type ("FSH" for fish)
7		REACHNO		Reach identifier ("A", "B", "C")
8		SMCOD		Sample identification code (SUNIT + Month &
				 Year of DATE + CTYPE + accession number)

Rows 9 to end are defined as such.

Column Number	Column Name	Description
1		TAXID		Taxonomic identification code
2		USGSFG		Flag to indicate that this taxon has been
				 assigned a temporary TAXID
3		PARENT		TAXID of the next highest ('parent') taxonomic
				 level
4		SCINM		Scientific name
5		AUTH		Taxonomic authority name and date
6		TAXON		NODC code
7		SRTCD		Sort code generated by taxonomic database and
				 used for taxonomic sorting
8		RNKCD		Code for the taxonomic rank(p=Phylum, C=Class,
				 etc.)
9		FISHNO		Sequential fish number for a station/reach/date/
				 species
10		METHID		Collection method
11		FISHNAME	Name of fish, common or scientific
12		NTYPE		Name type ("SCINM" = scientific name or "C" for
				 common name)
13		FSHTIME		Sampling time (seconds) or number of seine hauls
14		LABFG		Code that indicates if the fish were identified
				 in the field ("F") or laboratory ("L")
15		VOUCHER		Abbreviation of the facility where voucher
				 specimen(s) is(are) deposited
16 		BATFG		Code indicating whether the weight and/or
				 anomalies were determined from a batch of fish
				 ("Y") or from a single fish ("N")
17		TLNGTH		Total length of an individual fish (mm)
18		SLNGTH		Standard length of an individual fish (mm)
19		FSHWGT		Weight (grams) of an individual fish or a batch
				 (group) of fish.  If data are from a batch,
				 then the BATFG flag should be 'Y'
20		ABUND		Number of fish that represent the weight and/or
				 anomalies data for that line.  This value is
				 '1' if BATFG in 'N', indicating that the data
				 are for an individual fish.
21		SDATE		Date (mm/dd/yy) that the data were entered into
				 the file by the study unit.
22		SSRCE		Data source.  This should be the study unit or
				 the name of the ichthyologist that performed
				 the field or lab identifications.
23		USRCE		Update source (lab. id or name)
24		DE		Deformities.  Number of fish with deformities.
25		ER		Eroded fins.  Number of fish with eroded fins.
26		LE		Lesions.  Number of fish with lesions.
27		TU		Tumors.  Number of fish with tumors.
28		AL		Anchor worms.  Number of fish with anchor worms.
29		BL		Black spots.  Number of fish with Black Spot
				 disease.
30		CL		Leeches.  Number of fish with leeches.
31		FU		Fungus.  Number of fish with fungus.
32		IC		Ich.  Number of fish with Ich.
33		NE		No Eyes.  Number of blind fish.
34		PA		Other external parasites.  Number of fish with
				 external parasites other than the ones listed
				 above.
35		PE		Popeye disease.  Number of fish with Popeye
				 disease.