Biologist (Oxyrex)

 is a Tier 4 Tank that upgrades from Acid Trapper and Dual Trapper (Oxyrex) at level 45.

Design
The greatly resembles the Dual Trapper but it has a green decorative barrel similar to the one on Acid. It also has the same green glow as Acid Trapper.

Technical
Like the Acid Trapper, the 's traps inflict acid on hit, giving the hit entity non-fatal damage over time.