{"rewrite":{"id":"r_024b4a1c4cfcb7c8709ad4b6","clusterId":"c_3a897a13faadcc311edeb226","slug":"shelltas-reared-scallops-seven-months-in-artificial-seawater","model":"deepseek-v4-1-flash","headline":"Shelltas Reared Scallops Seven Months in Artificial Seawater","summary":"Shelltas Co., Ltd., based in Tokyo, kept scallops growing for about seven months in a closed land-based tank using artificial seawater made from naturally derived ingredients and no natural seawater, with no water exchange. The company says it also reared scallops and abalone together in the same tank, and that its next step is a scale-up demonstration in Akihabara, Tokyo.","whyItMatters":"The company is pitching closed land-based shellfish production as an answer to warming seas, and the Akihabara scale-up is where that claim either holds or does not.","webCardHtml":"\u003cp\u003eThe trial ran at the company\u0026#39;s own lab with no natural seawater. Instead it used artificial seawater developed from naturally derived ingredients, at a water temperature of 13-15°C, salinity of roughly 33 permil, and pH of about 8.1 to 8.4, with no ultraviolet or ozone sterilization and no water exchange over the roughly seven month period.\u003c/p\u003e\u003cp\u003eShelltas says it also reared scallops and abalone together in the same fully closed tank, and plans to test combinations with fish, seaweed and microalgae. The scale-up demonstration in Akihabara is the company\u0026#39;s stated next step.\u003c/p\u003e","blueskyPost":"Shelltas ran its scallops seven months with no water exchange at all. That zero-exchange detail matters more than the artificial seawater; it is what separates a closed tank from an aquarium.","twitterPost":"Shelltas kept scallops alive seven months with no water exchange. That detail is what makes a closed land tank a farming system.","threadsPost":"Shelltas reared scallops for seven months in artificial seawater with no water exchange. The no-exchange part is the harder engineering problem; artificial seawater alone still leaves you managing waste. Abalone sharing the same tank adds a second variable to that balance.","newsletterBlurb":"Shelltas Co., Ltd. confirmed about seven months of scallop rearing in a fully closed land-based tank using artificial seawater made from naturally derived ingredients, with no water exchange and no ultraviolet or ozone sterilization. The company says it also reared scallops and abalone in the same tank. Its next step is a scale-up demonstration in Akihabara, Tokyo.","attributionJson":"[{\"source\":\"ASCII.jp\",\"url\":\"https://ascii.jp/elem/000/004/442/4442138/?rss\",\"title\":\"A New Option from Japan for a Global Fishing Industry Shaken by Climate Change: Shelltas Succeeds in Composite Land-Based Aquaculture of Scallops and Abalone Using Artificial Seawater Developed from Naturally Derived Ingredients\"}]","lintFlagsJson":null,"lintHits":0,"costUsd":0,"inputTokens":4594,"outputTokens":598,"status":"published","repairAttempts":0,"nextRepairAt":null,"factsAttemptedAt":1791880646,"createdAt":"2026-10-13T08:35:22.000Z","publishedAt":"2026-10-13T08:36:09.000Z","updatedAt":"2026-10-13T08:36:09.000Z"},"cluster":{"id":"c_3a897a13faadcc311edeb226","canonicalTitle":"気候変動で揺らぐ世界の水産業に、日本発の新たな選択肢。Shelltas、天然由来の原料で開発した人工海水でホタテとアワビの複合陸上養殖に成功","representativeArticleId":"a_e72de99805228ed6ef3da4c3","sourceCount":1,"writtenSourceCount":1,"writeAttempts":0,"isSolo":true,"entitiesJson":"{\"anime_titles\":[],\"manga_titles\":[],\"work_titles\":[],\"studios\":[],\"people\":[],\"type\":\"other\",\"domain\":\"other\",\"is_roundup\":false}","contentType":"news","status":"published","firstSeenAt":"2026-10-13T05:00:00.000Z","lastSeenAt":"2026-10-13T05:00:00.000Z","updatedAt":"2026-10-13T08:36:06.000Z"},"attribution":[{"source":"ASCII.jp","url":"https://ascii.jp/elem/000/004/442/4442138/?rss","title":"気候変動で揺らぐ世界の水産業に、日本発の新たな選択肢。Shelltas、天然由来の原料で開発した人工海水でホタテとアワビの複合陸上養殖に成功"}],"entities":{"anime_titles":[],"manga_titles":[],"work_titles":[],"studios":[],"people":[],"type":"other","domain":"other","is_roundup":false},"keyFacts":null}