I Have just seen I have 2 of these growing off my liverock
so next sat we will have to empty tank half down and get the rocks out
of course it has to be on the rock at the bottom holding the others up
so guess what we will be doing sat morning on our 26th wedding anniversary..lol
sorting tank out
Ventricaria ventricosa is the most infamous of the bunch.
It bears a single, fluid-filled, and nearly spherical bladder of a thallus (or 'body').
To say that the bladder or vesicle is 'single' simply means it does not branch off
'daughter' bladders;
each and every bladder has its own anchorage on the substrate.
The bladders, which are single cells each, can grow to nearly 2 inches in diameter,
and can appear to have a curious sheen, especially when underwater,
that can almost conceal its dark green color.
The optical effect derives from the parallel arrangement of cellulose micro-fibrils
in the vesicle's wall,
and the near-crystalline state of the cellulose, similar to the same way that 'star'
and 'cat's-eye' gemstones
create their chatoyant sheen. The cell wall's toughness, smoothness,
and the sheer size of the bladder,
discourage many grazing herbivores from obtaining suitable purchase.
Its anchorage to substrate can be surprisingly strong.
The species is found around the Indian Ocean into the Pacific, as far east as
the Samoas and as far south as Australia,
as well as throughout the Caribbean. It is notorious for its tolerance
if very low light levels.