ive noticed a few things growing in my tank and wasnt sure exactly what they were so i avoided cleaning it until i knew they weren't eggs of something. as they have gotten larger they just seem to be simple filter feeding tube thingymajiggys whos name escapes me. but i thought id post a picture anyway because ive never seen one like it. they are mostly clear but seem to have a small concentration of organs or something in them, which is what initially made me think something may have deposited them as eggs, though i no longer believe thats the case. does anyone know a species name or anything for them? ive been avoiding cleaning them off the side until i know for sure, which of course means massive algae build up.