Neon green hairy mushroom

Neon green hairy mushroom is a tentacled mushroom coral, listed as Discosoma sp and kept among the hairy mushrooms for the covering of short, fine tentacles across its disc. A single polyp attaches to rock by a foot, and the disc spreads wide and low when settled, with the tentacles giving the surface a hairy, almost frilly texture that moves gently in the current. The neon green name follows the bright green carried across the disc and tentacles, a color that glows strongly under blue light and stands out even in a shaded corner.

The entry lists beginner care, low light, low flow, bottom placement, peaceful behavior, and moderate growth. Place the mushroom low, on rock near the sand bed, in a sheltered pocket where the disc can open flat. Low light at that level holds the green at full strength. Strong light can fade the color, shrink the disc through the day, or push the mushroom to release its foot and drift toward shade. Small changes over a week or more suit it far better than a sudden move onto bright rock.

Low flow matters just as much as low light. Flow that lifts an edge, folds the disc, or keeps it cupped all day is too strong for that spot. A mushroom that dislikes its placement may let go and float, landing against a stinging neighbor or in a bright, exposed place. Many keepers settle a new piece in a low-flow container with rubble until the foot grips firmly, then set the rubble where the mushroom will stay and leave it alone while it spreads.

Feeding is light and largely indirect. The mushroom absorbs nutrients from the water and can take very fine foods that settle among the tentacles, closing slowly around them. Regular reef feeding is enough in most tanks. Large meaty pieces usually slide off the disc or foul the rock around the base, and repeated handling to offer food delays attachment and costs more than the meal adds.

This coral is listed as peaceful and carries no sweeper reach. Spacing still deserves a thought. A settled disc expands wide at midday, babies appear around the foot over time, and a mushroom pressed directly against a delicate neighbor can irritate that neighbor where they touch. Leave a clear margin around the disc, keep LPS sweepers away from its sheltered zone, and choose a rock whose surface the colony can claim as it spreads.

Growth is moderate for a mushroom. The mother disc grows gradually, then produces babies from the foot or splits, and a settled group can cover a rock face over a season. Stable placement beats frequent repositioning, because every move restarts the attachment process. Keep nutrients present and steady. Very clean water can shrink mushrooms over time, while heavy swings invite algae across the rock the colony is spreading over.

Common pitfalls include high light in pursuit of brighter green, strong flow on a new piece, and checking the foot daily while it tries to attach. Give a loose mushroom calm rubble and shade, then leave it undisturbed until the disc opens wide in the same spot for a full week.

Field notes — what keepers report

- Settling reports focus on the first weeks. Some keepers describe a foot gripping rubble within days in a calm, shaded tray, while others describe repeated drifting after moves or flow increases. The shared practice is a sheltered rubble container and patience before any display placement.

- Color reports vary with spectrum and level. Keepers under blue-heavy light describe the green reading as near-fluorescent across a wide, flat disc, while keepers under whiter light describe a softer green on the same type of mushroom. Keepers who raised the light describe discs shrinking through the day until the piece went back down.

- Spread reports lean steady once the mushroom settles. Keepers describe babies appearing at the foot and the group claiming nearby rock over months, with faster spread on rock that stayed undisturbed. Reports agree that a mushroom moved often spreads more slowly than one left alone.