2017年9月23日 · Here's a basic guide to the most common sea urchins of Hawaii. Echinometra mathaei - Rock Boring Urchin: This is the most common urchin that you'll find in tide pools all around Maui. They come in one of two colors. One is a olive green, while the other is mauve.

2017年5月6日 · Sea urchins found in Hawai‘i do not contain poison that could be deadly to humans and most sea urchin spines do not need surgical removal.

2023年5月29日 · Sea urchins are often seen in rocky areas, coral reefs, and seagrass beds, which are abundant in Hawaii’s marine ecosystems. Their spiky appearance and vibrant colors make them a captivating sight for snorkelers, divers, …

Frequently observed by snorkelers and divers, sea urchins are abundant in the Hawaiian Islands. These echinoderms are closely related to sea stars and sea cucumbers and use tube feet that extend through their pores to help cling and move along surfaces.

2008年1月11日 · Shingle or helmet urchins, known as “ha’uke’uke kaupali” in Hawaiian, are some of the most unusual sea urchins to live in Hawaii. Except for a fringe of spines that extend around the perimeter of their shells, their spines have shrunk and flattened to form a plated dome to withstand the intense pounding of surf in the wave impact zone.

2005年1月25日 · Class Echinoidea -- Sea Urchins. Chondrocidaris gigantae - rough spined urchin. Description: large, blunt, pencil-thick spined urchin; spines covered with rough, thorn-like projections and often covered with encrustation's. Size: up to …

2024年4月12日 · Hawaii is home to several sea urchin species, including the Hawaiian collector urchin (Tripneustes gratilla), the red sea urchin (Strongylocentrotus franciscanus), and the slate pencil urchin (Heterocentrotus mammillatus).

Sea urchins are seen almost everywhere in snorkeling, including in tidal pools and at very shallow depths. The red pencil urchin, with very thick and rounded spines, is very photogenic. It is found throughout the Indo-Pacific, where it is very common, especially on the reefs of Hawaii.

When viewed under bright light, this urchin has spectacularly brilliant electric-blue lines on its upper surface. Although formerly rare in Hawai`i, in the last few years it has become common in some areas.

The shingle sea urchins (ha ‘uke ‘uke) have flattened spines and dome-shaped bodies to protect them from the pounding surf. They inhabit the wave impact zone of Hanauma Bay. All sea urchins have circular to oval shapes.