as in a silver fish not the bug

My bfffl bestie The guh

For I see you

Blue crab.

I recently got to see two of these in the wild, one in a spring and another dead on a beach (probably eaten by birds)

But what you do is, you get your smallest spoon. One that can be, as you say, almost surgically inserted into the fruit. Not a grapefruit spoon, those are implements of violence - we don't want to mash or tear the delicate vesicles of the fruit.

Turn the spoon over and with the very tip peel back the near membrane. Steady gentle pressure to detach the filaments holding the membrane to the fruit. Once you have the near side exposed comes the tricky part. If the flesh firm and responsive enough, you can cup the point / central end of the wedge with your spoon and gently - gently! - pry it back from the far membrane. Then you can sever the wedge from the rind with a decisive downward thrust of the spoon.

If the fruit is less turgid and cooperative, you have to scoop against the rind first, and then pull it away from the far membrane. This mashes the fruit more and loses more of the juice, but not every grapefruit is perfect, alas.