マリモ（毬藻）の育て方・育成ガイド
Aegagropila linnaei (syn. Aegagropila brownii) · Pithophoraceae
マリモ（毬藻）（Aegagropila linnaei (syn. Aegagropila brownii)）は水草です。 Pithophoraceae科に属します。 原産地はFreshwater lakes of the glaciated Northern Hemisphere (northern & central Europe, Japan). Ball-forming colonies are rare: Lake Akan (Hokkaido) is now the only lake with giant balls, and Lake Mývatn's (Iceland) had nearly vanished by 2014です。 光量はlowを必要とします。 適正水温：15°C – 24°C (browns in water above ~28°C)。 適正pH：6.0 – 8.5。 育成難易度：Easy。 生長速度：very slow (roughly 5mm per year)。
マリモ（毬藻）の育て方・育成方法は？
| 光量 | Low (keep out of direct sun) |
|---|---|
| CO₂ | 不要 |
| 水温 | 15°C – 24°C (browns in water above ~28°C) |
| pH | 6.0 – 8.5 |
| 配置 | 底砂の上に転がすか、岩の隙間にそっと配置 |
| 生長速度 | Very Slow (roughly 5mm per year) |
| 難易度 | Easy |
| 科名 | Pithophoraceae |
マリモ（毬藻）のトリミングや増やし方は？
No pruning required. Turn it now and then so every side gets light and it stays round, and rinse it under running water occasionally to wash out debris. Propagate by tearing it into pieces — they slowly round up again, or form a carpet when tied onto stone or wood.
マリモ（毬藻）によくあるトラブルや病気は？
Brown patches when the water is too warm (reported above ~28°C) or it gets direct sun. Tiny striped shells on or inside a ball are invasive zebra mussels, found in trade moss balls in 2021.
マリモ（毬藻）のトラブルや枯れへの対処法は？
Keep it cool and shaded and pick off brown parts. If you find zebra mussels, destroy the ball (freeze ≥24 h, boil ≥1 min, or bleach), bin it in a sealed bag, decontaminate the tank and report it.
マリモ（毬藻）の原産地や生息地は？
Freshwater lakes of the glaciated Northern Hemisphere (northern & central Europe, Japan). Ball-forming colonies are rare: Lake Akan (Hokkaido) is now the only lake with giant balls, and Lake Mývatn's (Iceland) had nearly vanished by 2014 · 生息地域（バイオトープ）：East Asia, Europe。
マリモ（毬藻）を購入する前に知っておくべきことは？
In March 2021 invasive zebra mussels were found in marimo balls sold in the US; by late April contaminated stock had reached 46 states. Destroy suspect balls by freezing, boiling or bleach and never put them in drains, waterways or gardens. Wild marimo is legally protected in Japan (since the 1920s) and Iceland (since 2006).
出典
- Marimo — Wikipedia
- Notulae Algarum No. 293 (26 Sept 2023) — correct name Aegagropila brownii — Notulae Algarum
- The structure and formation of giant Marimo (Aegagropila linnaei) in Lake Akan, Japan — PMC / peer-reviewed
- Aegagropila linnaei — Tropica
- Aegagropila linnaei – Marimo — Flowgrow Aquatic Plant Database
- Invasive Zebra Mussels Found in Moss Balls — U.S. Fish & Wildlife Service
- Aegagropila linnaei — Aquasabi
育成情報は 2026-09-23 にこれらの出典と照合しました。
マリモ（毬藻）を使った3Dレイアウトを見るには？
- ハロン湾のミニチュア — アクアリウム
最終更新日： · インタラクティブ3Dガイドを開く · すべての水草・生体ガイド一覧