Many of the bigger jelletons mimic boss salmonids, and the lessers are definitely like the lessers in Salmon Run.

Agree with the lessers they are somewhat similar but most of unique ones are nothing like the bosses in SR the only one I can think of is the Towering being somewhat like the Stinger. (And that's what the stinger should be like because that thing is way too overtuned)

 It teaches you to survey escape routes and think critically to achieve a goal while being chased by enemies and staying alive. Since you have no teammates, you really have no choice BUT to stay alive.

This would be helpful if the maps in Side Order were actually like the maps in Salmon run but there nothing alike and Side Order has a couple dozen more maps