I think it is a Java Fern as well, it is both definitely a fern, and it definitely isn't Bolbitis heteroclita, that has 3 definite segments to the frond.Looks like an emersed Java fern of some sort
whew,ok thanks for that info, I bought it, looked fine, it has been submerged ( I just pulled it out for a pic) but not in tank water. So the marks are not from critters, cool ,feel 100% better now:nw:Just be aware that the submerged version of a java fern will produce black spots too, this is not a disease but growth spores from which new java ferns grow