Freak

The Freaks are found in the labs and are plentiful.

The Freaks have no ranged attacks, but they come in hordes and will rush at you at all costs - a high rate of fire weapon, or something that pierces enemies, is probably the best way to deal with them.

When a Mutant Tube is broken, 8 Freaks will come flooding out of it.

Trivia

 * The Freak is a mixture of Fish and Eyes.