Mean Greens

Mean Greens is a classic beginner staple from the first era of named zoanthids: a solid bright green polyp colony that a new reefer could recognise across a shop, frag easily, and grow without drama. The master strain queue describes the morph in one line — solid bright green polyps, classic beginner staple — and that plain description is the strain's identity. Where collector strains chase rings, speckles and multi-colour faces, Mean Greens built its name on one saturated colour carried evenly across the whole colony.

The name was in ordinary keeper use early. A tank log on Melev's Reef, one of the hobby's long-running keeper sites, closes a zoanthid photo post with a picture of the new baby blue zoanthids and the 'mean greens' in the author's 55-gallon reef, listed casually among the named morphs of the period alongside Orange Bytor zoanthids and a red goniopora. The mention carries no sales pitch and no rarity claim. Mean Greens appears there the way a staple appears everywhere: as a known holding in a working reef, named because every keeper in the conversation already knew the morph.

Colour needs one careful paragraph, because the written record splits. The master queue and the strain's common name describe a solid green polyp. The strain's reference page at TankFacts describes the same zoas as predominantly green with red tentacles and a violet mouth, and gives polyp discs of 1 to 2 centimetres. Both descriptions stay in this entry. Lighting spectrum shifts how a green zoanthid photographs and reads to the eye, skirt and mouth tones show differently under blue-heavy light than under daylight, and material circulating under one early name can vary between colonies. The working identification is a colony whose overall read is solid, bright green at arm's length, checked under neutral light, with any red or violet detail treated as a within-record variation rather than a disqualifier.

Three green neighbours need clearing away before a buyer compares listings. Nuclear Green is a large Palythoa polyp with its own database entry, far bigger than this Zoanthus-type material. Green Bay zoas and Green Bay Packers zoanthids carry green with gold patterning and hold their own entries. Grouchy Green is a separate green morph with its own entry. A listing that only says "green zoas" gives a buyer nothing to check against; this entry's check is the solid even green, the small Zoanthus-type polyp, and the staple history behind the name.

Care follows the hardy zoanthid pattern, and the strain page agrees with the family record on durability while pushing light harder than the family baseline. TankFacts gives the strain's ranges as calcium 380–430 ppm, alkalinity 3.2–4.5 meq/L (about 9–12.6 dKH), magnesium 1,250–1,300 ppm, temperature 72–82°F, and salinity 1.023–1.025, from an Indo-Pacific origin. Top Shelf Aquatics' family guidance gives calcium 380–450 ppm, alkalinity 8–9.5 dKH, magnesium 1,250–1,350 ppm, nitrate 5–15 ppm, phosphate under 0.10 ppm, temperature 75–80°F, and salinity 1.024–1.026. Reef To Go's standard reef parameters sit inside the overlap: 77–79°F, salinity near 35 ppt (about 1.024–1.026), alkalinity 8–10 dKH, calcium 400–450 ppm, with low but detectable nitrate and phosphate. Zoanthids carry no calcium skeleton, so the colony itself makes no dosing demand; stability does the work.

Light is the one care point where this entry carries two records at once. The family band in the vendor guidance is 75–150 PAR, with a slow transition upward to prevent stress or bleaching. The strain page calls for strong lighting, with the colony set in the middle or top of the tank to receive the most light, in a mature tank. The care tile resolves the split at Medium, and the practice that honours both records is simple: start a new frag low, raise exposure over two to three weeks, and let the colony's own signals arbitrate — polyps stretching on long stalks ask for more light, and a colony closing at peak hours or washing out asks for less.

Flow should be moderate and indirect, which is the point both records share. The working pattern keeps debris and filamentous algae off the mat, brings food-bearing water across the polyps, and leaves the colony open and extended. The strain page singles out filamentous algae overgrowth as a real threat that can smother polyps, and moderate steady flow plus manual removal is the defence it implies. A pump aimed straight at the frag closes the colony and starts the decline a keeper can misread as disease.

Feeding is a light supplement. Light drives most of the colony's energy through its zooxanthellae. The strain page records nanoplankton and dissolved organics as the captive diet, and the family guidance adds fine phytoplankton and zooplankton foods, plus products such as Reef Roids or Benepets, fed a few times weekly by broadcast or gentle target feeding with the flow paused for about 10–15 minutes so the polyps can capture food.

Placement should plan for a mat with genuine spread. The family record describes zoas spreading rapidly across rock and, in favourable tanks, growing almost like an invasive coral, so the standard advice for this strain is an island rock or a rubble border, lower to middle placement, and the standard 2-inch clearance held honestly. A colony that outgrows its island can overrun slower neighbours and can also be burned by a more aggressive coral's sting when it wanders into range, so the leading edge deserves a look during routine maintenance. Fragging is easy with a high success rate in the family record, which is how a staple like this one circulated from tank to tank for years.

Pests and predators deserve a short check on any new frag. The strain page warns about the box snail (sundial snail) that feeds on zoanthids and calls for its removal, and the wider family record adds zoa-eating nudibranchs and spiders that travel on new material, plus the standing warning that some fish — angelfish and butterflyfish in the strain page's account — nip at tentacles. A dip and a close look before placement are cheap insurance for a whole zoa garden.

Safety applies here with extra plainness, because the strain page is unusually direct: it states that Mean Green Zoas are known to possess high levels of palytoxin and vibrio bacteria, especially in their mucus, and directs glove use in handling. No visual check separates a carrying colony from a clean one, for this strain or any other in the family. The handling rule stays the same across the family: gloves and eye protection whenever the coral is handled or fragged, care around open cuts, no exposure to high heat, and thorough washing afterwards. Heat matters because palytoxin keeps its toxicity when heated, so boiling or steaming rock that carries a colony is a hard rule to keep. Handled with that respect, a settled colony is a durable, long-lived aquarium coral and one of the friendliest first zoanthids a keeper can grow.

Field notes — what keepers report

- The earliest keeper trace found in the sources read is the Melev's Reef tank log: a zoanthid photo post from the author's 55-gallon reef names the 'mean greens' alongside baby blue zoanthids and Orange Bytor zoanthids, in the same ordinary tone the log uses for every established holding. The record shows the name in settled, non-commercial keeper use, attached to a colony in a mature mixed reef.

- A Reef2Reef keeper sale thread shows the strain at colony scale in a working zoa collection: a single large rock, about 8 by 5 inches, carried Devil's Armor (about 100 polyps), Sunny D's (about 15), Cat Eyes (about 30) and Mean Greens (about 30 polyps) together, offered at $320 for the whole rock. Two facts ride on that listing: this strain was grown out to multi-dozen-polyp colonies in mixed zoa gardens, and its value sat inside a shared garden rock rather than in per-polyp pricing — the economics of a staple, priced by the colony.

- A second Reef2Reef sale list, an older frag-clearing post, records the near-name Meanie Greenies among the zoanthid offerings (item Z9, in a list where frags ran $20 each or six for $100). The spelling may be a playful variant of this strain's name or a separate green morph on that seller's rack; the sources read cannot settle which, so this entry records the sighting and keeps the formal alias list to the master queue's Mean Green.

- The colour record splits, and both sides stay visible. The master queue and the common name describe solid bright green polyps. TankFacts describes green polyps with red tentacles and a violet mouth. Keepers comparing material should expect the overall green read to hold across both accounts while small-part tones vary with colony and lighting, and should judge a frag by the whole colony's appearance under neutral light.

- The placement record splits as well. TankFacts advises the middle or top of the tank for the most light, with strong lighting and a mature tank for propagation. Family vendor guidance starts zoanthids low, in the 75–150 PAR band, and acclimates upward over two to three weeks. The entry's Bottom–Middle placement and Medium light tiles follow the family practice for a new frag, and the strain page's upper placement stands as the record for an acclimated colony that is reaching for more.

- The strain page's pest and safety notes are blunter than most vendor copy, and they are kept here at full strength: filamentous algae can overgrow and smother the polyps, box snails feed on the colony and should be removed, and the page states high palytoxin levels in the mucus with a direct instruction to wear gloves. Keeper practice across the family — dip new frags, inspect for snails and nudibranchs, handle with gloves and eye protection — covers every item on that list.

- No current per-polyp retail price for this strain was found in the sources read this run. The priced records are the two keeper sale listings above (a roughly 30-polyp share of a $320 mixed garden rock, and the $20-frag list carrying the Meanie Greenies spelling). Quoting a modern designer-zoa price for this staple would misread its place in the trade, so the entry records the colony-era pricing that actually survives.