This is a long and hot summer in Croatia, without or with less rain that average, so water level of rivers and lakes are extremely low. Fish are less active than normally, and have short time frame of feeding. Some species like asp are especially careful in this conditions, and successfully avoid bigger lures. This is why I love small size and shape of Grace Minnow Elena 70F and Ryuki 50S lures.
First few hours of fishing with DUO lures I was at river Sava near Zagreb, where water is faster and occasionally we are catching asp, barbel, chub, and perch on wide range of artificial lures and flies. Ryuki 50S is ideal lure for faster water, although I prefer floating, this sinking lure is great for fast searching of the river rapids. First catch was a little asp, that was hunting a little pray near the bank and couldn't resist Ryuki. Beside this one I lost one much bigger asp, probably because of the size of the hooks, or just because he missed the lure. Later, I found that Ryuki has one wonderful characteristic. Ability to fish in decay while sinking, in a pause with a little twitching. Two times a barbel attacked it, but they didn't hooked like a few perch that grabbed it before. Chub is another species that likes this little, nervous lure, and I had a few. Generally Ryuki 50S will be adored by those who practice ultra light fishing techniques, and will bring them many trout among other game fish. In my opinion it will be great for our sea bass too, and for some other sea species. The main characteristics are: heavy weight sinking lure, capable to reach long distance with nice nervous, sharp action and reflection fish can't resist.