identification requested

In person it looks like a white blob with little spiky looking extrusions. assuming its a sponge? I've noticed it not filling out as much as usual. TIA!!

I am having issues battling dinos and I finally got them under a microscope. Think they may be Prorocentrum? Need some help identifying and treating because I really don't want to break down the tank and I cannot remove sand bed because I have wrasses. Equipment: Red Sea Reefer S1000 G2 ~265...

I have a few critters to ID and I hope none of them are bad. I have supplied a slew of pictures, with no clear meaning or direction. 1. I have a few clear/gray blob things around my tank that are just popping up and I’m not sure what they are. 2. I have a few root-like structures around the...

Hey guys this guy was a hitchhiker on one of my feather dusters. It appears to be a type of mushroom but I'm not entirely sure. It was attached to a very small pebble so i glued it to a frag rock. Base color is a blue-ishbrown with green tips. Any info will be appreciated, Thanks

Can anyone identify what this new brown substance is growing between the heads of this blasto? Recently started feeding heavier to increase nutrients for my SPS which were losing color. I've been seeing more algae and Dino growth, but this is new. 200 gallon mixed reef Live rock is 2 years...

I was at a local aquarium fish market a while ago and saw a super interesting type of "dragonet" as the person in the shop said, although they call anything they don't know what is a dragonet. It looked almost like a puffer fish mixed with a mandarin? It had the size and complexity of a mandarin...

This white translucent mound popped up overnight. Tank is well established, without any major issues for the past 2 years. Any ideas? It seems rigid and sprouted from one tiny stem like branch. There has been no change in size over the past week.

Noticed this scurrying around my glass recently. Are they flatworms and are they cause for concern? I have had a string of bad luck lateIy and I am currently treating the tank for Bryopsis and Dinos.

Hi guys, I suddenly found some small creatures on my tank glass and they are eating like a snail (but without shell). What are these? Should I keep them or eliminate them?

No bubbles in this stuff except when matted on algae. It is a fluorescence orange when under blue light. I'm stumped and thinking it's cyano or maybe some kind of dino. any help is greatly appreciated

Please help me identify this Conus species found near Kapalua, Maui (I think). No, I am not the Darwin Award wannabe holding it.