Ugh! That's manky! But, not unusual Is it a problem? Well it depends on how long since it's last clean. I have the same type and I clean it under the cold water tap at full bore. I'd clean it, dry it, put it back and check regularly. I seem to clean mine once a year, but it's not as yukky as that. I hope the orange I can see isn't rust. If it is it's likely come from the tank.
Some of the other stuff looks like the dread rubber slivers, if these get through to your needle valves you may get flooding if they stick 'em open, or starvation if they block them.
And rarely do I see filters 100% full, mine runs a 1/3 full.
Doug