![]() A sleepy sponge crab cuts a sponge with its claws, and then holds the sponge in place with its hind legs. The sleepy sponge crab can grow up to 20 centimeters in carapace size which it uses to carry a sponge. Here we have the largest species of sponge crab that is also one of the poisonous crab species. Diarrhea, drooling, speaking and swallowing difficulties, stomachache, thirstiness, and vomiting are also possible before unconsciousness and death. Some of the symptoms of the poisoning are blurry vision, breathing difficulty, chest tightness, dizziness, extreme muscle paralysis, and headache. ![]() ![]() The flesh of this crab species is as toxic as the pufferfish which is extremely dangerous to consume. Not different from the devil crabs, floral egg crabs are so lethal their meat remains toxic even after being cooked. They feed on algae and plants but they also eat fish sometimes. Floral egg crabs are slow-moving and secretive, and they are more active at night. They like to inhabit the neritic zone where they live in coral and rubble. This crab species occurs in the Eastern Indian Ocean including Southeast Asia all the way to Australia and the Western Pacific. As you can see, it has large spoon-shaped pincers with black tips. Meanwhile, the carapace is greenish or greenish-blue-brown with white or yellow patterns that resemble a shawl. A floral egg crab has an oval shell that is narrow with a smooth surface and soft margins. On the good side, fiddler crabs are highly nutritious with a delicious taste as long as they are safely prepared.įloral egg crabs have many other names such as green egg crabs, pancake crabs, and shawl crabs. Just make sure to prepare and cook them properly when they are fresh before eating them. While some poisonous crabs are extremely toxic even after cooking, fiddler crabs are not too serious. That simply means they contain a toxin called Domoic Acid that can lead to amnesic poisoning. The thing is that fiddler crabs feed on dead insects and plants that may contain bacteria and parasites. At the same time, they also eat non-insect arthropods and scavenge every now and then as well. When the tide goes out, they feed on algae and detritus along the shoreline and in the sand. Within their range, they create cylindrical burrows in marshy areas and sand or mud flats. They live in coastal marsh regions of the northern Gulf of Mexico, from Western Central Florida to Texas. The most interesting part is that their colors are darker during the day while getting lighter at night. It has a dull gray body that is more green-blue on the anterior of the carapace and long thin eyestalks. Males have one claw that is way bigger than the other that they use to attract females. A fiddler crab has 4 pairs of walking legs and a pair of claws. Gulf mud fiddler crabs or fiddle crabs in short are one of the poisonous crab species. The information that you find about them online is more about their aquarium reputation rather than their toxicity. So they also eat bubble algae and help clean the tank to keep home aquarium clean as well. Emerald crabs are scavengers that love feeding on nuisance algae and uneaten meaty foods. While being lethal to consume, many home aquarium enthusiasts like having them because of their diet. These poisonous crabs are native to the reefs of the Caribbean where they hide in caves or rubbles during the day. Their diet consists of coral algae, poisonous snails, and some crustacean like the yeti crabs. Its hair legs are thin and long while the spoon-shaped claws are large and smooth. An emerald crab is long instead of wide, and it has a flat carapace with a rocky texture. ![]() The deep green hue on their bodies gives them their name, and they are quite nice to the eyes. You can tell an emerald crab by its flat shiny green body and hairy legs that are not common in crabs. It is reported that Pacific Islanders use these crabs as a means of suicide. Next time you see something similar, make sure to check because bright colors and weird patterns scream lethal to eat. It is also possible for them to get caught with edible crabs so it is important to differentiate the non-poisonous and poisonous crabs. People tend to easily find devil crabs because they live on coral reefs so catching one is not difficult. They are also the most poisonous crabs in the Philippines and Timor-Leste as well.ĭevil crabs are common in the Indo-Pacific from East Africa to Hawaii, and as far as Australia and Japan. Toxic reef crabs are so toxic they can kill within a few hours of consumption, even with a small amount. This poisonous crab species is lethal due to the neurotoxins tetrodotoxin and saxitoxin in its flesh and shell. It has distinctive patterns of brownish blotches on its carapace, claws, and legs that indicate its toxicity. The devil crab also goes by many other nicknames such as devil reef crab and toxic reef crab.
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