By Katrina Wert Marine Ecology May 2012 Crab 1 Found in rock on beach wayy far left of jinetes Carapace width 85 centimeters Carapace length 6 centimeters Carapace color Bluishgrayish ID: 234117
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Slide1
Identification of Crabs and Other Organisms: Photographs
By Katrina Wert
Marine Ecology : May 2012Slide2
Crab 1
(Found in rock on beach
wayy
far left of
jinetes
)
Carapace width: 8.5 centimeters
Carapace length: 6 centimeters
Carapace color: Bluish-grayish
Underside of carapace is a whitish color
Legs: Purplish color with orange in joints
Chelae are smooth with white bottoms and black tips
Mouth field is
squarish
Antennae not visible
Black eyes with short stalks
Dactyls are all pointed/hooked tips (not flattened)
Fifth
pereopods
are similar length as all other anterior legs.
Front of carapace is wide without a rostrum
Carapace shape: Trapezoidal
Carapace and appendages not set with coarse setae
Guesstimated Family:
XanthidaeSlide3Slide4
Crab 2 (2 slides)
Slide 1:
(Found
in
sebilarid
reefs at
cocalitas)Carapace width: 1.2 centimetersCarapace length: 0.4 centimeters
Carapace color: reddish-brown
Underside of carapace also reddish color
Eyes are red with short stalksChelae are red with black tips and smooth. Very very tip is a reddish color. Legs are red with yellow to white jointsFifth pereoppods are similar length to all other anterior legs. Dactyls are sort of rounded tips; almost pointed, but definitely not flattened. Carapace shape: triangularAnttenae not visibleCarapace and appendages not set with coarse setaeFront of the carapace is wide without a rostrumMouth field is square. Guesstimated Family: Xanthidae
Slide 2:
(
found in
sebilarid
reefs at
coalitas
)
Carapace
width: 2
centimeters
Carapace
length: 1.4
centimeters
Chelae
tips aren’t as black
as slide 1 crabSlide5Slide6Slide7
Crab 3
(Found in rocks at
cocalitas
)
Carapace width: 1.7 cm
Carapace length: 1.4 cm
Carapace color: Speckled grey, brown and greenish colorUnderside of carapace is yellow-whiteChelae are smooth with black tips. Underside of chelae are purple.
Eyes are black with short stalks.
Legs are
greyish with yellowy colored joints.Some setae on legsAntennae not visibleFifth pereopods close in length to all other anterior legsMouth field squarishFront of carapace broad without rostrumNo teeth visible on carapaceDactyls are not pointed, but not flattened. Sort of roundedCarapace is an oval shapeCarapace and appendages not set with coarse setaeGuesstimated Family: XanthidaeSlide8Slide9
Crab 4
(the Brown Crab) (found in rocks to left of Jinetes @ night)
Carapace width: 4.3 centimeters
Carapace length: 3.2 centimeters
Carapace color: Medium brown
Carapace underside color: whitish
Eyes are blue with short stalksMouth field is squarish
Fifth
pereopods
similar length to all other anterior legsChelae are brown on top, smooth and white on bottom, with Black tips. Carapace shape: ovalDactyls are pointed, with hooksFront of carapace broad without rostrumGuesstimated family: XanthidaeSlide10Slide11
Crab 5
(
Purplish crab) (found in rocks in front of Jinetes @ night)
Carapace width: 4 centimeters
Carapace length: 1.8 centimeters
Carapce
color: Purplish blue (periwinkle)Carapace underside is whitishLegs are white with purple bands between joints.
Chelae are rough on top and purple with dark reddish-brown tips. Underside are smooth and white. The bumps get smaller on sides of chelae and the bumps are purple even when the chelae color transitions to white. An orange
bloth
on palm side of chelae right near darkened tips. Eyes are medium size with short stalks and black in color.Legs have light amount of setae on them. Front of carapace has double row of teeth on each sideHas no median toothFamily Eriphiidae, Genus EriphiaSlide12Slide13
Crab 6 (2 slides)
Slide 1:
(found
in front of Jinetes in
tidepool
)
Uca panamensis
Family
Ocypodidae
, Genus UcaMale versionCarapace width: 1.4 centimetersCarapace length: 0.9 centimetersBig Chelae length: 1.7 centimetersLegs are a yellow colorBig chelae is smooth and yellow with some white on underside and some darker yellow on top side Eyes are black with long stalksTop of carapace is an offwhite color with gray marking and the underside is a grayish color.Characteristics of the family: Fifth pereopods near as long as anterior legs. Mouth field square. Outgoing branchial channels opening laterally. Front
of carapace broad without rostrum.
Branchial
region not
inflated. Front
of carapace without teeth. Antennules folding obliquely or transversely.
Fifth
perepods
not ending in flattened dactyls
. Carapace
rectangular, wider than long, front narrow without median notch. Eyes with long stalks.
Characteristics of
genus: Orbits nearly straight
, suborbital margins with rounded tubercles. Carapace
smooth; lateral
margins nearly parallel behind acute
anterolateral
angles, then converging. Male
major
cheliped
with outer surface finely granulated; inner surface with oblique
tuberculate
ridge running
vertically down from dorsal surface, then bending obliquely to run somewhat parallel
to gape
; two rows of
denticles
at base of fixed finger Characteristics of species: Front wider: narrowest below eyestalk bases, its breadth between them twice or more basal breadth or erected eyestalk; tubercules of lower, outer manus moderate to minute. Small chela: gape much narrower, ranging from about equal to width of adjacent part of dactyl to , in distal half, absent; serrations various; carapace arching various. Small chela ending distally in long, thick brushes of stiff setae; major outer manus with proximal end projecting beyond distal part of carpus; front broad, contained about 3 times in carapace breadth.
Slide 2:
(found on rock at
cocalitas
)
Uca
panamensis
Family
Ocypodidae
, Genus
Uca
Female version
Carapace
width: 1.3 centimeters
Carapace length: 1 centimeterSlide14
Crab 6 (cont’d)
Slide 2:
(
found on rock at
cocalitas
)
Carapace width: 1.3 centimetersCarapace length: 1 centimeterFamily OcypodidaeFemale versionSlide15Slide16Slide17Slide18
Brownbar Snapping Shrimp
Alpheus
lobidens
Length: 3.5 centimeters
Height (excluding legs): 0.5 centimeters
Found in
Sebilarid
reefs in rocks on left side of
cocalitas beachCharacteristics:Size to 4 cmAbdomen segments banded with gold and brownWhite banding on leg jointsInhabits bays and lagoonsFound under rocks and in sebillarid reefsReference: BookSlide19Slide20
Sea Cucumber
Found
in
tidepool
(hot tub one) in crevice at
cocalitas
beachBrownish-yellowy colorNo clue how to IDAbout 14.5 centimeters long with ??tubules?? extendedSlide21Slide22
Sucker Fish
(Found in
Sebilarid
reefs on left side of
cocalitas
beach)
Length: 3.7 centimetersWidth: 0.5 centimeters at widest pointDark eyesBody is light brown with mottled dark brown bands across body with no patterned spacing.
Has no apparent fins.
“tail” is the body coming to a direct point at end with no caudal fin present.
Has a sucker thing under base of head and uses that and wriggling of its tail to get around.Has gills on side of headSlide23Slide24
Fireworm
(Found in
tidepool
at
cocalitas
)
Scrunched up length: 2.5 centimetersStretched out length: 4.5 cenitmeters
(rough estimate) (from photo)
Width: 0.3 centimeters (excluding outer ruffles)(with outer ruffles: 0.55 cm)
Body is segmentedWith reddish-orange body (looks pink in water). With orangish bristle clumps on both sides of each segment.One end is purplish looking form I would assume digestive tract/wastes.Underside is a whitish-yellow color with a tint of pinkSlide25