noticeable

The only noticeable real effect of the moon on the earth are the tides.

And there's also a slightly noticeable but better-than-nothing anti-reflective coating.

One of the most noticeable groups are the burrowing mayflies; sizable specimens which use their legs, tusks, and a scoop on their heads to dig U-shaped tunnels.

Not dramatically, but it's still noticeable.