This is my second attempt at keeping a yellow clown goby and they wont eat. Everything else in tank is very healthy parameters perfect. Tankmates are common clownfish watchman goby and mandarine goby. He seems too afraid to leave his perch during feeding though he does grab food that comes close but then spits it out. I feed frozen mysis. He is looking very skinny now dont think i have much longer. What is wrong with these fish?