Box- A box if white, speaks of a spiritual gift from God. it speaks of righteousness and victory and holiness.
Fish- A fish speaks about lost souls being won for God.
Insects- A blowfly is a flying insect which represents the attitudes of people which can be very distracting.
See creatures of the air for more details
I think The box is representing your spiritual gifts and the fish represents winning souls for God through Christ Jesus. The fly represents attitudes of people that may cause distraction in your calling.