Grouper

A Grouper is an orange Crasher. It spawns in groups of four in the pentagon nest.

Design
The Grouper looks like an orange irregular heptagon.

Technical
The Grouper isn't THAT powerful, but to make up for this, these guys always spawn in groups of 4.

Countering
Don't stay close to a rammer if this crasher is nearby. This crasher can help it ram you. But alone if not on very low health, they don't pose a threat. Be wary of this crasher, though because it can do quite a lot of damage to glass builds, and a Destroyer (crasher) can come and one-shot you after this, and yes, this happens quite commonly through crasher related deaths. And avoid it when at low health because on rare occasions the fourth grouper kills you.

Trivia

 * The Grouper as a boss is the Trape-Fighter.
 * The Grouper is obviously named and functioned after the fish of the same name.
 * With the new addition of any nest NPC being able to commence in groups, the Grouper became useless.