I don't know if I am the only one doing this but I have been collecting local New York encrusting sponges to feed to moorish Idols. Most of my fish do not eat it except the moorish Idol loves it as do the clown gobies. Lately my bangai gobi also eats it. While diving in the South Pacific, sponges was all I ever saw Moorish Idols eat so I decided to collect it here. I am sure New York sponge does not resemble their natural sopnge diet but since he loves it so much and it is easy to collect and freeze I use it. It looks disguesting and grows on pilings and docks all over the north east including on my boat. I just take it and freeze it as it comes out of the water with no preparation. It has seaweed, starfish, crabs and small shrimp all over it and they get frozen with the sponge. I just scrape a little off to feed. The Idol will eat as much as I give him.
Have a great day.
Paul
Have a great day.
Paul