Authorities say he could have violated a fishing ban.
A fisherman in Fujairah is being investigated after catching a 350 kg shark.
Eid Suleiman could be guilty of hunting the pregnant bull shark during an annual five-month fishing ban of the species.
That means he could be facing a six-month suspension to his fishing licence.
The Ministry of Climate Change and Environment says it's leading the investigation in to the incident.

UAE forces deal with incoming missile, drone threats
H.H. Sheikh Mohammed congratulates Dubai World Cup winner
Emirates Global Aluminium reports significant damage after attack
UAE air defences engage 20 ballistic missiles, 37 UAVs
Gargash urges political approach to regional security