In The Matrix Revolutions (2003), AK is searching using his computer to (unsuccessfully) scan The Matrix for Niobe and Ghost.
Roland: Search every pipe, every hole, every crack we know. Sweep as wide as possible, as fast as possible.
AK: Captain, these lines are crawling with calamari.
What does "calamari" mean?
Calamari is the term for squid meat generally, so he is referring to the robotic Sentinels (more usually called "squids" or "squiddies") that we see attacking in the films. These occur in the real world, rather than The Matrix of course, one example being the attack on the Nebuchadnezzar in the original Matrix film.
A sentinel's frightening appearance reminds many humans of squids, where they get their nickname of "squiddies". They tend to fly in swarms like insects, that can range from a few to thousands.
