This had been a sort of experience..as we ventured through the stalls (you may find awesome deals for pepper & salt here, of course these wont' have fancy packing like in the farms but the product is the same and you pay 1/4 or 1/3 of farm price) browsing staff and restaurants and we were hijacked by a strange lady chanting "crabs, crabs, fi dola, fresh, come" and brought to the seafront. They got a basket full of tiny crabs with just a few medium size ones and as we repeated we wanted big ones like three times we still had to reject the smallest ones and force them to pick up bigger. As we were happy with a kilo of crabs the lady raised her face at us, grinned and whispered "cookin iz ....freeee". We had to follow the lady under the roof where she murdered crabs and put them into questionable bucket with questionable water and added a pinch of salt. Since this is a live fishmarket the place was literally stinking, a cleaning lady was laziliy mopping the water on the floor, the rats were running here & there minding their own business, and the fishermen resting in the hammocks & spitting around on the floor and into the sea. In the end we were awarded with a plastic bag of our cooked catch and having thought the boiling would kill all the bad stuff we just walked into the restaurant nearby and ordered drinks. Waitress was kind enough and brought us couple of claw crackers.

All in all it was authentic experience. The crabs were medium to small size, fresh but rather bland. If you buy less than a kilo you might be forced to pay 1USD for cooking otherwise get a bag of fresh, uncooked crabs to have fun with. This place is full various seafoods fresh and cooked.

i dont like seafood. so i cant really comment on that. but my friend ordered crab and enjoyed it.
make sure you point out you want a LARGE crab. because if your foreign they will sometimes give you the small crab but you still have to pay the same price as a large.
we asked several times for a large crab but still got a small/medium sized but still my friend enjoyed it.
you have to have it with the local speciality kampot pepper aswell.
when it gets exported they mix it with other things so this is the only place where you can have the pepper fresh from the farm and untampered with.
its great to be here in the evening around 5pm to have an authentic khmer dinner by the river and watch the sunset.

We passed through Kep and decided to have lunch there it was a great idea @ lily restaurant, we then ventured towards the crab marked incredible sight fresh from the Sea well worth the trip.

If ever in Kep, you have to stop at the Crab market either in the morning to see the fishermen coming back or during the day to grab some food. Don't hesitate to try some grilled chicken, prawns or even fish. The hygienic rules are certainly not the same then in Europe but as it is cooked and grilled, you don't have to fear anything. And the experience is really worse it! We pay 2.5USD for a bunch of prawns and the same for a chicken leg (October 2015). One big fish should cost you app. 3USD. You have to negotiate the price, especially if you are "Barrang" :-)