Terrorists and pirates with an ecological bend, they style themselves as Gaia's vengeance and aspire to bring an end to galactic civilization. Due to poor equipment, worse organization, and a universal failure to acquire any warp drives whatsoever they are very, very, unlikely to even get anyone to notice them. They often float around in easily-defeated groups and randomly attack ships, unable to go anywhere or band together. They spend most of their time painting.
"Amazon" - 2,434,000, third bracket.
Named after a terrifying creature that covered most of a continent, the Amazon was originally a mining ship, it is the largest of Harvest's fleet. As it was originally designed to cut moons in half, nothing in the galaxy can withstand it. However, as a retro-fitted civilian ship it lacks the damage control of a military vessel, its fixed beam has no arc of fire, and any damage to the prism array well active renders the entire ship inoperable.
"Mangrove" - 727,650, second bracket. If it is deemed too wall-like I'll swap it out.
Named after the dangerous ambush predator of Old Earth, this ship was originally a traffic patrol craft. It's primary armament is an EMP launcher. It is effective a disabling speeding freighters, but as a military ship it lacks firepower.
"Piranha" - 190,250~, first bracket.
Just as its namesake spun webs to ensnare its prey, so does the Piranha lie in wait. Which is good, because it doesn't move anywhere very quickly. Its only armament is a single mass driver, easily stymied by moderate shielding. Originally a smaller Industrial Mass Driver, the line was discontinued due to flammability concerns.
Edit: Third entry modified.
Edit 2: Third entry door placement and crew role names / colors changed.
Edit 3: Lore added.