Toxic crabs are enemies in Ratchet & Clank and the 2016 re-imagined game. They are mutated crabs with giant claws and strong shells, often found amongst darters and woken by screamers. After being hit, they will immediately retaliate by striking with their claws.
In the original release, toxic crabs were encountered in the Kogor Refinery, Orxon. First, crabs were found by Clank during "Search the laboratories" and "Traverse the wilderness", in which Clank would find stationary toxic crabs that he had to send Gadge-Bots after to destroy. Later, they were encountered by Ratchet during "Explore as Ratchet" and "Catch the Infobot", in which Ratchet had to get past the toxic crabs either by defeating them, or defeating the screamers to stop them waking up and attacking him.
In the re-imagined release, toxic crabs were encountered in different locations. First, they were encountered in the Blarg Research Outpost, Gaspar, found in the mission "Trade 10 brains for a jetpack" and throughout the rest of the Telepathopus Fields while gathering telepathopus brains from many of the other islands in the lava. Later, they were encountered in the Jowai Resort, Pokitaru, on top of the Torgoff Waterfall during "Find a way to the top of the waterfall".
Toxic crabs are large, dark red crabs, with very strong shells, small legs, and two giant claws from long arms. They have blue eyes with sharp teeth from their relatively small mouths. They are often found in packs. Their shell makes them very durable, and after taking damage, they will immediately retaliate by thrusting their arm forward to hit Ratchet. Their four legs allow them to walk as fast as Ratchet and also to walk sideways somewhat, making them difficult to evade.
In the original release, toxic crabs are normally sleeping until woken by a screamer or by Ratchet, and are not woken by darters. They will follow and attack Ratchet as long as he is within their reach and within their line of sight, though after he is out of their reach, they will return to their sleep.
In the original release, when fought as Clank, toxic crabs remain in a single position. Clank should never attack them, but should instead command the Gadge-Bots to kill them.
When fought as Ratchet, toxic crabs are a huge threat due to their durability and speed, allowing them to catch up to Ratchet, and their immediate melee range counter attacks. Their claw, while countering, can also block small projectile weapons. Attacking them at close or medium range is not recommended, as not only will their counter attacks and speed allow them to reach him quickly, but their numbers can overwhelm Ratchet. Therefore, the most viable tactic against them is either to kill nearby screamers and bypass them without ever waking them up in the first place, or to use the Devastator from a distance, as they cannot block it, and being safe from harm is crucial. When it is impossible to shoot from a distance, using the Bomb Glove can also be viable, or using the Decoy Glove to distract them. The Taunter can also be extremely useful when luring them into forcefields, or when luring them into mines from the Mine Glove.
In the re-imagined release, toxic crabs are still durable enemies, but are less of a threat, due to the greater abundance of ranged weapons. The Pixelizer or Proton Drum can knock them back while dealing decent damage, and either the Fusion Grenade, Plasma Striker, or later the Warmonger, can be effective against them from a relative range. When fought on Gaspar, using the Jetpack is often the easiest way to evade them when overwhelming Ratchet, though the Groovitron can also provide much-needed breathing room.