what is the difference between male and female blue crabs?
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Male blue crabs (Jimmies) have a long, pointy apron as seen in the first picture below. Mature females (Sooks) have a rounded apron as in the second picture below. You may also see crabs with triangle-shaped aprons. These are immature females and are called “v-bottoms”.
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Most of the time the uropods will tell which gender your isopod is. Males often have a longer last pair of legs. There are also some kinds which have differently coloured segmental plates. Porcellio silvestri females shine with a full and bright orange while the males are more plain in general.
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Male crabs are typically bigger and meatier than females, who stop growing after they reach maturity. But that's not the whole story. “It's all based on supply and demand,” said the owner of a crab house in Arbutus, who charges $25 more for males by the dozen.
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Color Differences Males are usually an iridescent shade of bright blue. This bold coloration helps them to attract mates. Females, on the other hand, have much more subdued plumage. Their feathers tend to be either brown, gray or cream in color.
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Generally, females are a bit shorter and more wide-bodied than male bettas. Males tend to have more elongated bodies that are slightly flatter, side-to-side.
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Females Have Big Aprons When you flip a male and female Alaskan king crab over, you can readily see a difference in the tail flaps that fold over the bottoms of their shells. ... The female's apron appears bell-shaped, while the male's looks like the letter T.
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Male grasshoppers are smaller than females. That's the easiest way to tell the difference if you don't have a specimen in hand. If you do have a grasshopper to examine, check the end of the abdomen. Grown males have a hard and smooth plate on the abdomen's end, which ranges in size from small to quite prominent.
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Males tend generally to be larger in size than females, with larger chelae and narrower abdomens. Crawfish tails host small appendages, including swimmerets. Male crawfish carry an extra set of these swimmerets, which are enlarged and hardened. Females possess a small hole just behind their swimmerets.
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Male sharks tend to be smaller than females. But the easiest way to tell them apart is to look for claspers. Males have a pair of claspers, which are used for mating. This is like a pair of extra roll-up fins under their body.
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Subtle Differences Generally, tarantula females are larger and bulkier than males. ... Similarly, female tarantulas have broader chelicerae, her jaws or fangs, than males do in proportion to their body size.
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How do you tell the difference between a male and a female kingfisher? ... The key to telling the difference between a male and female kingfisher is the beak colour. The males beak is all black, the female has a pinky orange tinge to the lower part of the beak.
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Males are often slimmer but larger-bodied than females and are more vibrantly colored. The dorsal and anal fins of the male are more pointed, larger and more flowing than in the female. In many species, the male will display egg-shaped markings on the anal fin known as egg spots.
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Males of both species have dark blue backs, wings and heads, with orange breasts. But, male Western Bluebirds have blue throats, while the male Eastern Bluebirds have orange throats. ... Females of both species have bluish-gray coloration on their backs, wings and heads, as well as faded orange breasts.
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Specify gender: Crab gender is easy to distinguish: male crabs (or "jimmies") have a narrow, T-shaped "apron" on the back of their shell, while female crabs ("sooks") have a wide apron. In addition, live females have red-tipped claws, while male claws are blue.
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Male blue jays tend to be larger in size than females, but since males and females share the same plumage, it is difficult to tell them apart by size alone. Careful observation of courtship and nesting behavior is the best way to tell the sexes apart.
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The females and males of snapping turtles are about the same size. The difference between sexes shows mainly in the structure of the tail, and for the male snapper the tail is longer, thicker ( 2 ), and the vent is located much further ( 1 ) from the edge of the plastron then that of the female.
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Male lobsters tend to have bigger claws than females of a comparable size. ... Under their tails, all lobsters have small appendages, called pleopods, or swimmeretes, which help them to swim. On a female, these limbs are soft and feathery, while on a male, they're hard and bony.