Moves very slowly, but has a lot of health. Its attack intervals are relatively slow, but his damage is quite high. What makes him hard to fight is his ability: he has a 30% chance to slow your cats down, rendering them useless as other enemies go to whittle down your cats' health. It also has very high range, outranging nearly every cat in the game.
Since Sunfish Jones has massive range, the only realistic way to deal with him is to create an opening by defeating the enemies' frontline first. An alternative is to use cats that can reach them with Long Distance or Wave Attacks, but that is rarely an option.
An excellent method to deal with this enemy is to spam Ramen Cat, due to his attack, HP, and Resistance vs. Angels as well as not being knocked back until he is killed.
Cats like A. Bahamut, Kalisa and Balrog Cat make quick work with Jones, as their massive DPS can turn him into fish meat. Just make sure to clear out any peons with the Cat Cannon or support units. Jones's low-ish damage allows them to tank a few hits from him, making the window for them to be sent out much bigger, as well as allowing them to land more hits on him.
A Floating variant of Sunfish Jones that only appears in the Survive! Mola Mola! Collaboration Event. It has greatly reduced health along with lower damage and range. However, it has 1 knockback instead of 4 and has very slightly increased movement speed.
A Starred Alien/Floating variant of Sunfish Jones seen in Cats of the Cosmos. It has much less health and slightly less damage, but typically appears with high magnification. It also has a barrier with 12,000 health. It takes more time to attack and can get knocked back less frequently. Still very deadly.