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Sea urchin injuries are caused by contact with sea urchins, and are characterized by puncture wounds inflicted by the animal's brittle, fragile spines. [ 1 ] : 431 Injuries usually occur when swimmers, divers, surfers, or fishers by accidentally touching them or stepping on them.
Diadema paucispinum is a small sea urchin with very long, moveable spines which are slender and sharply pointed. They can be up to 25 cm (10 in) long and about four times the diameter of the test. The primary spines are bluish-black in colour, often with pale bands in younger individuals.
Diadema antillarum has a "shell," similar to most other sea urchins. What distinguishes the Diadema is the length of its spines. Most sea urchin spines are 1–3 cm, but the spines in this species are usually 10–12 cm in length, and can grow as long as 30 cm in very large individuals.
Sea urchins are dying in large numbers across the Caribbean, according to scientists who are racing to pinpoint the cause of the mysterious die-off. Skip to main content. 24/7 ...
Last year, sea urchins in the Caribbean started getting sick — shedding their spines, dying off and throwing reef ecosystems into chaos. “The case is closed,” said study author Mya Breitbart ...
Expert warns urchins vital to coral reef ecosystems now ‘functionally extinct’ in Red Sea
Bald sea urchin disease is a bacterial disease known to affect several species of sea urchins in the Mediterranean Sea, North Atlantic and along the California coastline. Research suggests two pathogens are responsible for the disease, Listonella anguillarum and Aeromonas salmonicida .
These days, long-spined sea urchins are known as the gardeners of the sea. They tend the algae on the coral reefs they call home, making sure it never overwhelms their hosts. Spotting one on the ...
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