 Now I'm going to show you the zebrafish facility where we breed our zebrafish and we produce eggs for our Alzheimer's disease research. We see in our zebrafish facility are many different tanks with many different genetic strains of zebrafish. But our main interest in these fish is to get the eggs from them so that we can then inject them with substances to regulate gene activity. You can see a number of zebrafish tanks. These tanks are in a light chamber. Now the reason why we have a light chamber is because the zebrafish like to lay their eggs in the morning when the lights come on and we want to inject zebrafish eggs all day. So what we do is we have the light chambers here, here and here have different daylight cycles so that the morning begins at different times and the eggs will be laid throughout the day so that we can inject them. So how do we get the eggs from the fish? Well if you look here you can see a little box of marbles. To the zebrafish these marbles look like river stones and the zebrafish like to lay their eggs over river stones. So what we do is we put this little box of marbles into the fish tank and then when the fish lay their eggs they'll do it here and then we filter off the water and we can get the eggs from there. Down here you can actually see a tank where we have a box of marbles in the tank and the fish are laying their eggs over that. And over here we have another system. This is a specially designed tank with slots in the floor and the fish lay their eggs and they fall through the slots and then they collect in the bottom. At the moment you can see the food which we fed the fish earlier that also fell through the slots.