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Toxopneustes pileolus, commonly known as the flower urchin, is a widespread and commonly encountered species of sea urchin from the Indo-West Pacific.It is considered highly dangerous, as it is capable of delivering extremely painful and medically significant stings when touched.
Toxopneustes is a genus of sea urchins from the tropical Indo-Pacific.It contains four species.They are known to possess medically significant venom to humans on their pedicellariae (tiny claw-like structures).
Eucidaris tribuloides, the slate pencil urchin (named after slate pencil), is a species of cidaroid sea urchins that inhabits littoral regions of the Atlantic Ocean.As a member of the basal echinoid order Cidaroida, its morphological, developmental and molecular genetic characteristics make it a phylogenetically interesting species.
Toxopneustes roseus is similar in appearance to the more widespread flower urchin, Toxopneustes pileolus.It can be distinguished by having a rigid "shell" that is a solid pink, red, or purple in color, in contrast to the variegated coloration of the test of Toxopneustes pileolus.
Sea urchins move by walking, using their many flexible tube feet in a way similar to that of starfish; regular sea urchins do not have any favourite walking direction. [13] The tube feet protrude through pairs of pores in the test, and are operated by a water vascular system ; this works through hydraulic pressure , allowing the sea urchin to ...
Tripneustes gratilla, the collector urchin, is a species of sea urchin. Collector urchins are found at depths of 2 to 30 metres (7 to 100 ft) in the waters of the Indo-Pacific, Hawaii, the Red Sea, and The Bahamas. They can reach 10 to 15 centimetres (4 to 6 in) in size.
These long-spined sea urchins, or Diadema antillarum, are prickly black creatures that hide out in reefs across the Caribbean. They play a key role as “lawnmowers” of the reef, Breitbart said ...
The water vascular system is a series of canals through which fluid moves to help propel the podia of the sea urchin. The fluid that fills the water vascular system is similar to marine water, but also has free wandering cells and organic compounds such as proteins and a high concentration of potassium ions when compared to the surrounding sea ...