Usually at the bottom of the tank in the rocks.
That means your fish is ill
If your seahorse is lying on the bottom of the tank, it's probably dead. They normally remain upright even when asleep.
Because they're tired.
because it cannot get out to lay them in the corner
No it can't and won't hurt anything, It will just lay on the bottom of the tank.
Lay your baby on the changing table or a bed. Gently lift up his legs and rub the cream on his bottom where he needs it.
Until you remove it...it's most likely dead.
because the fish may be sick and does not have the sternth to swim.
Guppies are livebearers so they don't lay eggs.
it means they are most likely dead or going to die
The sugar would lay on the bottom of the tank so the only way to know would be to remove the tank and remove the sending unit to gain access to the inside of the tank.