Crab life cycle game online. Biology lesson for students from 2nd to 7th grades to learn the stages in the life cycle of a crab.
A crab is a crustacean that lives in all types of oceans, fresh water, and on land. It has a short, projecting tail and a single pair of pincers. Its body is covered with a thick exoskeleton. There are three major types of crabs: reddish, blue, and green. Here are a few facts about crabs. Read on for more information.
Red and blue crabs are similar to mollusks. The red and blue colors of the females are more pronounced than those of the males. The males are larger than the females. They can live for up to 50 years. The eggs have an eggshell that is about half the size of the female. These mollusks are about the size of a small pigeon.
Crabs are part of the family Brachyura. They are classified by size and sex. Males have bigger claws and use them for attracting mates. Their abdomens are triangular, while females have rounded, flat bodies. The exoskeleton of crabs protects the body from injury, and their legs are articulated, so that they can walk sideways. Buying a male crab is the best option if you're interested in breeding them.
Crabs are of the infraorder Brachyura, which is the most diverse of all crustaceans, with over 7,000 species in 98 families. It is believed to have more varieties than the Decapoda. Many of these species are adapted to live in deep oceans, but they can also live in fresh water and on land. Unlike crayfish, it's usually not hard to identify a male from a female.
The life cycle of the crab begins with the egg. The egg shell is made of a hard substance called a zoeae, which hatches into new larval crabs. These newbies will float in the water among the plankton. These larvae will grow and pass through four or five stages before reaching the megalopa stage. The next stage is the adult, which looks a lot like a combination of a lobster and a hermit crab.
Once the egg hatches, it will move offshore to feed on microscopic algae and larvae. The crab will enter the megalopa stage, which lasts six to twenty days. During this stage, its body becomes wider and its head is more pointed. This is the final stage of the life cycle for the blue crab. Its next stage is to transform into a mature crab. The blue crab is also a good food source for the other crabs and predators.
The crab larvae are about the size of a dime and have a high sense of sight and smell. Their main nervous system is located at the abdomen, so they have the ability to feel pain. This means they can avoid predators that would otherwise eat them. They are highly intelligent and possess two main nerve centers, which enable them to detect stimuli. If they get harmed or injured, they are able to quickly return to the mother to nurse.
If you want to practice the stages in the life cycle of a crab, hit the start button in the game above and then drag and drop each stage to its right position. Hit the submit button to find out if you got it right. This game is for children in 2nd to 6th grades who are studying biology.