Gastridium geographus (English spelling)Gastridiumgeographus

Japanese: Gastridium geographus（英語表記）Gastridiumgeographus

...A snail shell of the Conidae family, named after the Indonesian island of Ambon, known for its deadly poison (illustration). In Okinawa, it is called Habu-gai after the poisonous Habu snake. The shell is cylindrical and thin, 11.5 cm high and 5.5 cm wide, and coils about 10 times, but is low. The shell surface has a brown mesh pattern and three brown bands on a white background. It is covered with a thin, grayish-yellow shell. The shell opening is wide and high, and the inside of the opening is purple-white. The water tube groove at the bottom is wide. The soft body is dark brown, and when crawling, a long water tube protrudes from the water tube groove. ...

From 【Imogai (Cone Shell)】

...They stretch their mouths wide and swallow their prey whole. The poison is a nerve agent, but the poison is particularly strong in the case of the amboin shellfish, Gastridium geographus (illustration), which feeds on fish (mostly small gobies), and can immobilize a person within a few seconds of being stung. Sometimes people have been stung and killed while harvesting.

*Some of the terminology that mentions "Gastridium geographus" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…インドネシアのアンボン島にちなんで名付けられた猛毒で知られるイモガイ科の巻貝（イラスト）。沖縄では猛毒ヘビのハブにちなんでハブガイという。殻は円筒状で薄く，高さ11.5cm，太さ5.5cmになり，10回くらい巻くが低い。殻表には白色の地に褐色の網目模様と3本の褐色帯がある。その上に灰黄色の薄い殻皮をかぶる。殻口も広くて高く，殻口内は帯紫白色。下端の水管溝は広い。軟体は暗褐色で，はうときは水管溝から水管を長くつき出す。…