That is a severely bleached bubble-tip. Likely a green one that has expelled it’s zooxanthellae. I don’t know that there are any pure/stark white anemones that will host clownfish. There are a few brownish/tan ones that read sort of as white but that aren’t truly white (sebae, long tentacled), but the only naturally white anemones in the hobby that I can think of are Condylactis and some rock flowers (though they generally have some striping or other colors), and neither will host clownfish.
I thought this was a white bubble tip anemone? If it’s a different kind of anemone please let me know.
As for the chocolate chip sea star, I just think they’re really cool looking and am trying to go for a black and white tank. They eat mostly squid, shrimp, and clams which I already stock in my kitchen anyway. Looks like the suggested way to feed them is cut up the food in small pieces and gently bury in the sand for them to find and eat. I haven’t seen anything warning about them eating anemones. I’ll look into different types of starfish though. I’m still quite a bit away from having anything in my tank other than the sand and rocks, so I have time to research (the tank doesn’t have to be ready until December anyway). Is there a specific LED brand/model you recommended for the best results? Thank you
Chocolate chip starfish are generally tan and brown, though some have a lighter base color with darker nodules and under blue light can look kind of black and white. The problem with them is that they need to be fed every other day, which is a massive bioload for an aquarium, they generally starve to death because people don’t keep up with feeding them. And when they do keep up with feeding them, nutrient levels spike, which can also kill them (starfish are not very tolerant of high nitrates), this is especially a concern in a 30 gallon tank. The other thing is that if it does survive, they get massive, like over a foot across (which means they need even more food), which again, would be a huge concern in a 30g tank. I guess the point I’m trying to get at is that they’re just not a great choice for home aquaria. It’s your tank, but IMO, when a species comes with so many concerns and that severely limits what other species you can keep, it’s a deal breaker.
Black and white is going to be kind of tough, if you added some red, it could be a really cool tank. White rock, black sand, some white clowns, a couple bangaii cardinals, a flame hawkfish, maybe a black clown goby, some white and red rock flower anemones, a red bubble tip anemone, some black and red Zoanthids, some solid red blastomussa, a white and red cocoworm, some red mushrooms, scarlet hermits, a red and a white serpent star, some black keyhole limpets (if you can find some), and then there are tons of red corals (some have some white and/or black accents). It could be a stunning tank.