Crayfish can eat fish, other invertebrates like crabs and shrimp. They are generally carnivorous and can harm fish in your tank if you try to keep them as pets. The interesting thing about mandibles is that unlike human jaws, the jaws of the crayfish open from side to side. If you watch a live crayfish, you can see the eyes move independently. The cephalothorax as seen in the above picture makes up the crayfish's midsection.
The abdomen is flexible and the segmentation is visible here. The appendages of the crayfish attach to both the cephalothorax and the abdomen.
If a crayfish loses a leg, the leg will regenerate regrow. The head and thorax are fused, forming the cephalothorax. Crayfish have two body segments.
A crayfish will use its antennae for touch, taste, and smell, and its antennules for balance, touch, and taste. We also find the mouth parts of the crayfish here. The mandibles are the crushing jaws, and two pairs of maxillae hold and tear solid food before it reaches the mouth. Background: Like all crustaceans, a crayfish has a fairly hard exoskeleton that covers its body.
As shown in the diagram on the next page, its body is divided into two main parts, the cephalothorax and the abdomen. The cephalothorax consists of the cephalic or head region and the thoracic region. Crayfish mate in the early spring and females carry the fertilized, developing eggs inside their bodies for 4 to 6 weeks.
The eggs then hatch by the end of spring. A crayfish's unique characteristics are their antennule a smaller type antenna or similar organ on the head of a crustacean , their cheliped the claws or pinchers of a limb , and their telson the middle lobe of a fan tail. Crayfish tend to live under rocks and emerge at night to feed on any food source they can find. Crayfish are omnivorous and will eat other fish and crayfish whether they are live or dead, vegetables, and aquatic plants.
The bulk of the vegetables they consume in the wild are aquatic plants. Crawfish , crayfish, and crawdads are the same animal. Which term you use may depend much on where you live.
Louisianans most often say crawfish , whereas Northerners are more likely to say crayfish. Crawfish aren't indigenous to Singapore, but the people who acquire them as pets refer to them as freshwater lobsters. The stomach and esophagus are common in the humans body. The cephalothorax consists of 3 segments.
Of the eight pairs of appendages on the cephalothorax , the first three are maxillipeds, which hold food during eating. The chelipeds are the large claws that the crayfish uses for defense and to capture prey. Each of the four remaining segments contains a pair of walking legs. A third and longer pair of antennae are tactile, or touch receptors.
Two compound eyes provide excellent vision , except in some cave-dwellers that live in perpetual dark and are virtually blind.
Below the rostrum are two pairs of mandibles the jaws and three pairs of maxillipeds, which are small appendages that direct food to the mouth. The second pair of maxillipeds facilitate gill ventilation by swishing water through the banks of gills located at the base of each pereiopod on the sides of the carapace in the gill chambers.
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