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Palythoa grandis Protopalythoa grandis

Palythoa grandisis commonly referred to as Protopalythoa grandis. Difficulty in the aquarium: Easy. A aquarium size of at least 100 Liter is recommended. Toxicity: Toxic.

Profilbild Urheber Lemon Tea Yi Kai, Japan

Palythoa grandis and Anthellia sp., 2015

Courtesy of the author Lemon Tea Yi Kai, Japan . Please visit for more information.

Uploaded by Muelly.

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Palythoa grandis 
Protopalythoa Grandis 
Family tree:
Animalia (Kingdom) > Cnidaria (Phylum) > Anthozoa (Class) > Zoantharia (Order) > Sphenopidae (Family) > Palythoa (Genus) > grandis (Species) 
Initial determination:
(Verrill, ), 1900 
Costa Rica, Gulf of Mexico, The Bahamas, the Caribbean 
Sea depth:
2 - 4 Meter 
up to 1.97" (5 cm) 
71.6 °F - 80.6 °F (22°C - 27°C) 
Plankton, Zooxanthellae / Light 
22 gal (~ 100L) 
Possible to breed 
Not evaluated 
Red List:
Not evaluated (NE) 
Related species at
Catalog of Life:
  • Palythoa anthoplax
  • Palythoa australiae
  • Palythoa capensis
  • Palythoa caribbaeorum
  • Palythoa complanata
  • Palythoa dartevellei
  • Palythoa densa
  • Palythoa durbanensis
More related species
in this lexicon:
Last edit:
2021-01-11 11:27:21 

Captive breeding / propagation

The offspring of Palythoa grandis are possible. Unfortunately, the number of offspring is not large enough to cover the demand of the trade. If you are interested in Palythoa grandis, please ask your dealer for offspring. If you already own Palythoa grandis, try breeding yourself. This will help to improve the availability of offspring in the trade and to conserve natural stocks.


Palythoa grandis is (very) poisonous and the poison can kill you under circumstances!!!
If you want to keep Palythoa grandis, inform yourself about the poison and its effects before buying. Keep a note with the telephone number of the poison emergency call and all necessary information about the animal next to your aquarium so that you can be helped quickly in an emergency.
The telephone numbers of the poison emergency call can be found here:
Overview Worldwide:

This message appears for poisonous, very poisonous and also animals whose poison can kill you immediately. Every human reacts differently to poisons. Please therefore weigh the risk for yourself AND your environment very carefully, and never act lightly!


Apart from their colour and polyp size most Zoanthus species look very much alike, so they can hardly be identified exactly by mere physical appearance. Marine aquarists and coral traders have assigned telling names to the large variety of Zoanthus species referring to the special colouration morphology of the polyps to identify a particular specimen. Firstly, these fancy variety names are commonly used in the stocking lists of importers and coral shops, secondly, the majority of saltwater hobbyists are more familiar with them and thirdly, the reeflex entries will be easier to find via search engines. So that is why we have decided to list the different varieties of Zoanthid species under their common fancy names on reeflex.
As a rule, Zoanthid corals are rather easy to care for and are often recommended as beginner corals.
They gain most of their daily nutritional requirements through the photosynthetic activity of their symbiotic Zooxanthellae, but also absorb nutrients and dissolved organic matter from the water column. They also feed on captured plankton.
Zoanthid polyps do not necessarily need to be fed directly, but will benefit from occasional feedings with finely chopped frozen foods, zooplankton additives or dust food, which will help them to thrive.
Their durability makes them to be rather forgiving to less optimal water parameters and lightning conditions. Zoanthus species may be placed in intensely as well as in moderately lighted areas, they are able to cope with moderate as well as with high and turbulent flows, however, strong currents directly directed towards the colonies may cause the polyps to stay closed.
Under proper lightning and water parameters most Zoanthus species will grow fast- sometimes too well, spreading over rocks and eventually supersede adjacent corals.

Some Zoanthid species, especially those in the genera of Palythoa and Protopalythoa can be highly toxic for humans. These Zoanthids may excrete Palytoxin, one of the most toxic organic substances in the world. Normally, this will not be noticed during the reefkeeper’s normal daily routine, but can become a real danger when Palythoa or Protopalythoa species are forcibly removed or fragged. Whereas several reef keepers have reported severe health problems they suffered when handling Palythoa or Protopalythoa species, species of the Zoanthus genus are generally considered to be rather harmless, at least there is no known case of a serious intoxication caused by a Zoanthus species. Nevertheless, since it is difficult for the average hobbyist to distinguish Zoanthus, Palythoa and Protopalythoa species from each other, you should always handle Zoanthid species with proper caution. When touching them or removed them for your tank, you should always wear protective gloves and goggles, wash your hands thoroughly afterwards and avoid any eye contact.

Protopalythoa grandis Verrill, 1900

External links

  1. Reef Builders (en). Abgerufen am 19.08.2020.
  2. World Register of Marine Species (WoRMS) (en). Abgerufen am 19.08.2020.

Private Nachzuchten



Protopalythoa grandis
Protopalythoa grandis
Palythoa grandis and Anthellia sp., 2015
Interzoo 2018 bei DeJong Marinelife
Palythoa grandis (c) by Simone Chand
© Anne Frijsinger & Mat Vestjens, Holland
Protopalythoa grandis
Marcus Weidemann, Zoafanatics
Marcus Weidemann, Zoafanatics
© Zoafanatics Marcus Weidemann

Husbandry know-how of owners

am 10.06.15#1
Eine persönliche Information von Klaus.

jetzt habe ich unfreiwillig mal den Härtetest gemacht. Am Samstag habe ich viele Korallen losgemacht oder beschnitten. Da hatte ich massig Korallenschleim verschiedener Arten u. a. dicke Scleimbatzen einer zerteilten Protopalythoa grandis an den Händen. Beim Schneiden mit einer Rosenschere habe ich dann nicht aufgepasst, dass mein Finger hinter dem Ableger war und mir einen tiefen Schnitt mitten im Schleim verpasst. Der Schnitt klaffte weit auseinander mit minimaler Blutung. Da wurde es mir auch bange und natürlich war kein Jod im Haus. In der Hundeschachtel habe ich noch eine Flasche ältere Braunollösung gefunden und kräftig über den Schnitt gekippt, verpflastert und dann weitergemacht. Die Wunde hat sich aber nicht entzünset und ich hatte keinerlei Beschwerden. Mittlerweile heilt der Schnitt gut und ist an den rändern nur noch etwas entzündet und gerötet.
Meine Protopalythoa grandis sind bzw. waren, zumindest am Samstag, Palytoxinfrei :-)
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