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Answer (1 of 4): Scorpions are considered arachnids. Though crustaceans possess a hard exoskeleton and segmented body just like scorpions, but they have antennae, gills, seven pairs of appendages and mostly found in marine habitats. Scorpions' and reptiles' categories are well far apart. Scorpions have eight legs and an exoskeleton. , Scorpions use their stinger to inject venom, where spiders use their fangs. [14], Most arachnids lack extensor muscles in the distal joints of their appendages. However, we do not guarantee individual replies due to the high volume of messages. Twenty-five of them is dangerous enough to kill a human. Sea spiders are marine arthropods like horseshoe crabs, but they are not arachnids. But the matter of fact is scorpions can survive almost everywhere, not the desert alone. Technically, true bugs are insects with four wings and sharp, sucking mouthparts from the order Hemiptera, such as stink bugs and aphids. Scorpions can survive underwater for a while, thanks to their book lungs which allows them to fill their system with enough air to survive up to 48 hours underwater. A scorpion sting is caused by the stinger in a scorpion's tail. Scorpions tend to avoid contact. Are scorpions crustaceans? - Answers These creatures are not true scorpions. So when you consider that insects evolved from crustaceans, then referring to crustaceans as insects of the ocean is really the wrong way around.Instead, it would be more accurate to refer to insects as shellfish of the land as their ancestors came from the sea! For general inquiries, please use our contact form. [40] Some mites have no heart at all. All rights reserved. Advertising revenue supports our not-for-profit mission. Apart from any fair dealing for the purpose of private study or research, no If the scorpion happens to find a weak spot on the crabs armor shell and injects its venom into it, then it can be deadly to the crab. Most people dont know where to put them or how to classify them. Answer:Scorpions usually live on land. The vast majority of crustaceans are marine dwelling animals, while arachnids are mainly terrestrial, i.e., land-dwelling.