Silverfish are not a stronghold in the game of Minecraft. They are just mobs that spawn in Strongholds.
Unlike regular mobs, Silverfish are not very useful to the player. They do not drop anything, and they do not give any experience. They are small, gray, and mouse-like mobs.
There are several kinds of Silverfish. Some are infested stone blocks, while others spawn from broken monster eggs in igloos and basements. Occasionally, a spawner will generate in an End Portal room.
In addition, Silverfish can spawn from special blocks. This includes cracked stone bricks and cobblestone.
When attacked, a Silverfish will call for reinforcements. A Silverfish swarm can be a real danger. The silverfish will infest other blocks if the block it is in is destroyed. If the block is not destroyed, the Silverfish will remain inside.
While it is rare to find Silverfish in a Stronghold, they can still be found. They spawn in end portal rooms in strongholds, and in the Extreme Hills Biome.
Silverfish can be attacked by ice golems and snow golems. However, they do not attack humans. Their attacks are often quite damaging. They will also suffocate when they are infested with Soul Sand.
These creatures can be encountered at any light level. They spawn in the vicinity of a Silverfish Block. Unlike regular stone, they cannot spawn on or in slabs, stairs, or other smooth stones.
Silverfish are hostile mobs, but do not have many health points. It is possible to kill a Silverfish with a sword, but they will respawn.