24 samples of fish species, including Euryglossa orientalis and Psettodes erumei, have been caught from April to June 2006. These two species were collected from two fishery regions, Bandar-Abbas and Bandar-Lengeh north of Persian Gulf. The fish species were randomly collected from commercial catches that landed at the local fishing ports.

Immediately after the collection, fish samples were stored on ice in an isolated box and transferred to the reference laboratory of the Hormozgan environmental deputy. Body weight and length of fishes were measured. Then male fishes were selected and a part of the dorsal muscle and liver tissue was removed and prepared for processing. All of the samples were dried at 60 ° C for 48 h in a laboratory oven (Pyle, 2005).We use MOOPAM method for samples prepartions (MOOPAM, 1999).