Main Ref.	Trono, G.C. Jr., 2001
Appearance refers to

Sex attributes

specialized organs
different appearance
different colors
remarks

Descriptive characteristics of juvenile and adult

Striking features
Body shape lateral
Cross section
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Diagnosis	Thallus erect, consisting of a steel green to greyish, fan-shaped frond. Holdfast thick and bulbous. Frond composed of 1 or more series of overlapping flabellate or reniform segments, slightly to moderately calcified and arising from a short, slender stipe. Upper margins of segments finely divided in concentric zones. Blade-like filaments terete, repeatedly dichotomous and 45 to 70 μm in width; constrictions present, of unequal distances above the dichotomies. Determinate lateral branchlets stipitate, pinnately-alternate arranged, constricted at 1/3 to 1/4 of the distance from the main axis of the filament; ends of branchlets inflated and forming club-shaped or narrow bell-like structures. Thallus (excluding holdfast) up to 11 cm in height; holdfast to about 8 cm in length (Ref. 80758).
Ease of Identification

Meristic characteristics of Udotea argentea

Lateral Lines	Interrupted: No
Scales on lateral line
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line
Scale rows below lateral line
Scales around caudal peduncle
Barbels
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
total
Vertebrae
preanal
total

Fins

Dorsal fin(s)

Attributes
Fins number
Finlets No.	Dorsal
	Ventral
Spines total
Soft-rays total
Adipose fin

Caudal fin

Attributes

Anal fin(s)

Fins number
Spines total
Soft-rays total

Paired fins

Pectoral	Attributes
	spines
	soft-rays
Pelvics	Attributes
	Position
	spines
	soft-rays