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Photo: PDM/FIS

Algaedonia Bets on Algae to Feed New Caledonia’s Fish

Click on the flag for more information about France FRANCE
Monday, February 02, 2026, 02:00 (GMT + 9)

A local startup is turning seaweed into a sustainable alternative to imported fishmeal, with promising results for aquaculture in the Pacific

In New Caledonia, the startup Algaedonia is exploring a local, sustainable alternative to imported fishmeal and soybean meal: algae. This innovative approach, aimed at strengthening the territory’s aquaculture sector, is supported by successful feeding trials on the striped sand eel—a flagship species of the lagoon—according to Darianna Myszka from Produit de la Mer (PDM).

 

Photo: Algaedonia/Linkedin

What if algae became the cornerstone of more sustainable aquaculture in New Caledonia? That is the challenge taken up by Algaedonia, a young company specializing in the cultivation and processing of local macroalgae. Working in partnership with the New Caledonia Technopole (CCDTAM), the company is testing algae-based feed for the striped sand eel (Siganus lineatus), a herbivorous fish highly valued by local consumers.
“In the wild, the sand eel feeds mainly on algae and seagrass,” explains Algaedonia. However, in fish farms, the species is still fed pellets made exclusively from imported ingredients, with no algae content. To address this gap, the company has developed a flour made from ulva, a locally available green algae, incorporated into experimental feed pellets.

Photo: Algaedonia/Linkedin

The first results, obtained after four weeks of trials, are encouraging. Juvenile fish fed a diet containing sea lettuce meal showed growth rates equivalent to those fed a conventional control diet, despite a slightly lower protein level. These findings suggest that locally produced marine plant proteins could partially replace imported protein sources without compromising performance.

Beyond nutrition, sea lettuce offers multiple advantages. Rich in fiber, minerals, and proteins, it grows rapidly in nutrient-rich environments and can be co-cultivated with shrimp or other marine species in an integrated multitrophic aquaculture system. This approach not only produces feed ingredients but also improves water quality by recycling aquaculture effluents.

Looking ahead, Algaedonia is preparing the next phase of development, with new trials planned for the picot shrimp, followed by experiments on the Caledonian blue shrimp starting in 2026. The company’s medium-term ambition is to help structure a local seaweed farming industry capable of supplying aquaculture farms sustainably while reducing dependence on imports.

In terms of scale, Algaedonia estimates that around 15 tons of seaweed meal per year would be required to support the picot oyster farming sector, and nearly 80 tons per year for the shrimp farming sector.

Seaweed is one of the few aquaculture products with a positive environmental impact,” the company emphasizes, positioning this initiative as a concrete driver of the blue economy and ecological transition in New Caledonia.


🇯🇵 日本語(Japanese)

アルガエドニア、ニューカレドニアの魚を支えるため藻類に賭ける

地元スタートアップが輸入魚粉に代わる持続可能な海藻飼料を開発、太平洋の養殖業に新たな可能性

ニューカレドニアでは、スタートアップ企業 アルガエドニア(Algaedonia) が、輸入された 魚粉や大豆粕 に代わる 持続可能で地産の代替原料 として 藻類 に注目している。この革新的な取り組みは、同地域の 養殖産業 を強化することを目的としており、ラグーンを代表する魚種である シマアイゴ を用いた試験で有望な結果が得られていると、プロデュイ・ド・ラ・メール(PDM)ダリアナ・ミシュカ 氏は語る。

もし藻類が ニューカレドニア における持続可能な養殖の鍵になるとしたらどうだろうか。地元産大型藻類の栽培・加工 を専門とする若い企業 アルガエドニア は、その可能性に挑戦している。同社は ニューカレドニア技術拠点(CCDTAM) と連携し、シマアイゴ(Siganus lineatus 向けの藻類ベース飼料の試験を進めている。この 草食性魚類 は、地元消費者から高く評価されている。
「自然界では、シマアイゴは主に 藻類や海草 を食べています」と アルガエドニア は説明する。しかし養殖場では、現在も 藻類を含まない輸入原料のみのペレット が使用されている。そこで同社は、地元産の緑藻ウルバ を原料とした 藻類粉末 を開発し、試験用ペレット に配合した。

4週間の試験 で得られた初期結果は非常に有望だ。アオサ粉末 を含む飼料を与えられた稚魚は、タンパク質含有量がやや低い にもかかわらず、従来飼料と 同等の成長率 を示した。これは、地元産の海洋植物性タンパク質 が輸入原料の一部を代替できる可能性を示している。

栄養面に加え、アオサ には多くの利点がある。食物繊維、ミネラル、タンパク質 が豊富で、栄養塩の多い環境 で急速に成長する。また、エビなどの海洋生物と同時養殖 する 統合多栄養段階養殖(IMTA) により、水質改善と排水の有効活用 も可能となる。

今後、アルガエドニアピコエビ を対象とした新たな試験を予定しており、さらに 2026年 からは ニューカレドニア産ブルーシュリンプ での試験も計画している。中期的な目標 は、養殖場に持続的に供給できる 地域型海藻養殖産業 を構築し、輸入原料への依存を減らす ことだ。

同社の試算では、ピコカキ養殖部門 を支えるには 年間15トン の海藻粉末が必要であり、エビ養殖部門 では 年間約80トン が求められるという。
海藻は、環境に正の影響をもたらす数少ない養殖資源のひとつです」と アルガエドニア は強調し、このプロジェクトを ニューカレドニアのブルーエコノミーと環境移行を推進する具体的な手段 と位置づけている。


🇨🇳 中文(Chinese)

Algaedonia 押注藻类,助力新喀里多尼亚水产养殖

一家本地初创企业以海藻替代进口鱼粉,为太平洋地区养殖业带来可持续新方案

新喀里多尼亚,初创公司 Algaedonia 正在探索一种 本地化、可持续 的替代方案,以取代进口的 鱼粉和豆粕 —— 藻类。这一创新举措旨在推动当地 水产养殖业 的发展,并已在潟湖标志性物种 条纹兔鱼 的饲养试验中取得积极成果。Produit de la Mer(PDM)Darianna Myszka 对此进行了介绍。

如果藻类能够成为 新喀里多尼亚 可持续养殖的关键,会发生什么?专注于 本地大型藻类种植与加工 的年轻企业 Algaedonia 正在尝试回答这一问题。该公司与 新喀里多尼亚技术园区(CCDTAM) 合作,为 条纹兔鱼(Siganus lineatus 测试以藻类为基础的饲料。这种 草食性鱼类 在当地市场备受青睐。
“在自然环境中,条纹兔鱼主要以 藻类和海草 为食,” Algaedonia 表示。然而,在养殖系统中,该鱼类目前仍使用 完全依赖进口原料、不含藻类的颗粒饲料。为此,公司开发了一种由 当地绿藻——石莼(ulva) 制成的 藻类粉末,并将其加入 实验性饲料颗粒 中。

为期四周的试验 后,初步结果令人鼓舞。食用含 海莴苣粉 饲料的幼鱼,其 生长速度与对照组相当,尽管饲料中的 蛋白质含量略低。这表明,本地海洋植物蛋白 有望在不影响性能的情况下,部分替代进口蛋白来源。

除了营养价值,海莴苣 还具有多重优势。它富含 膳食纤维、矿物质和蛋白质,在 富营养水体 中生长迅速,并可与 虾类或其他海洋生物 进行 综合多营养级养殖(IMTA)。这种模式不仅生产饲料原料,还能 改善水质并回收养殖废弃物

展望未来,Algaedonia 正筹备下一阶段发展,计划对 皮科特虾 进行新一轮试验,并从 2026年 起开展 新喀里多尼亚蓝虾 的相关研究。其 中期目标 是建立一个 本地海藻养殖产业,可持续地为养殖场供料,同时 减少对进口原材料的依赖

在规模方面,Algaedonia 估算,支持 皮科特牡蛎养殖业 每年需要约 15吨海藻粉,而 虾类养殖业 则需要接近 80吨/年
海藻是少数对环境产生正面影响的水产养殖产品之一,” Algaedonia 强调,该项目被视为推动 新喀里多尼亚蓝色经济与生态转型 的重要抓手。

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www.seafood.media


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