he is about 15 inches. Turning into a complete monster. I cant keep any fish with him. He just ate a 3 inch flame angel with zero issues. My girlfriend bless her heart tried to suprise me with it. She didnt think it would eat him.. We came home and the fimby had a nice lump and the fish was gone. She knew better not to put it in the 150. The eel will eat any fish. He wont mess with inverts like hermits and starfish. But if it has fins its game over. I have the 75 just sitting around. Im going to move him over once I get it started back up. I moved all my equipment and sand and rock to my 150.