Deductable Investment expenses?

Can you claim hidden investment expenses on mutual funds? Example: XYZ fund has an expense ratio of 0.66% which equals to $6.60 per $1000 of investment. If you had this mutual fund worth $1,000,000.00 this would equate to a yearly fee of $6,600.00. Since the brokerage doesn’t present you with a fee for this service can you still claim this as an investment expense?