NetLogo - Have an agent identify one of two other types of agent closest to it and perform actions conditional on which agent type is identified - netlogo

Question

Suppose I have 2 breeds of agents, sharks (stars and dots) and fish. The stars (large sharks) can eat dots (smaller sharks) and fish that are in-radius 0.5 of a star. A star should eat what is closest to it, either a dot or fish. For simplicity purposes, agents cannot move, and whether or not a star can feed depends on its spatial proximity to dots and fish during setup.
But i'm struggling to get the code to work. Specifically,
I am encountering an "expected reporter" error message in my code and i cannot figure out how to solve this, although I don't know if fixing the code will achieve the aim. Any help is greatly appreciated.
Below is my code:
; Create the agents
breed [sharks shark]
breed [fishes fish]
sharks-own
[
energy
]
fishes-own
[
x0 ; Starting x-cor
y0 ; Starting y-cor
]
to setup
; Always start with this
clear-all
reset-ticks
ask patches [set pcolor gray]
create-sharks 666
[
set color blue
set energy 100
ifelse who >= 15
[
set shape "dot" set size 2.5
]
[
set shape "star" set size 3.5
]
setxy random-xcor random-ycor
]
create-fishes 300
[
setxy random-xcor random-ycor
set x0 xcor
set y0 ycor
set shape "fish"
set size 2.5
set color white
]
; this procedure gives an "expected reporter' error
if shape = "star"
[
ifelse min-one-of turtles with [shape = "dot"]
[
ifelse any? sharks with [shape = "dot"] in-radius 0.5 ; namely here
[
fd 0
]
[
set energy (energy + 100)
set color green
] ; End of 2nd ifelse
]
[
if min-one-of turtles with [shape = "fish"]
[
ifelse any? fishes with [shape = "fish"] in-radius 0.5
[
fd 0
]
[
set energy (energy + 1)
set color yellow
]
]
] ; End of 1st ifelse
] ; End of 1st if
end

Answer 1

You core issue is you are using ifelse min-one-of turtles with [shape = "dot"] as though min-one-of will give a true/false, but it will report a turtle. The error message NetLogo is giving is not great in this case. What I think you want to use any? in those cases (there are two of them that I see).
After those are resolved you have a context error, where you are checking if shape = "star" , but you aren't inside an ask [...] block where that check would have a turtle context to be valid. Maybe that's just a copy/paste issue in getting this question code ready, but I thought I'd note that, too.

Answer 2

Ok after many hours of blood, sweat and tears I finally arrived at the solution. In case the issue/objective is of interest to anyone else, the working code is as follows:
; Create the agents
breed [sharks shark]
breed [fishes fish]
sharks-own
[
energy
]
fishes-own
[
x0 ; Starting x-cor
y0 ; Starting y-cor
]
to setup
; Always start with this
clear-all
reset-ticks
ask patches [set pcolor gray]
create-sharks 666
[
set color blue
set energy 100
ifelse who >= 10
[
set shape "dot" set size 2.5
]
[
set shape "star" set size 3.5
]
setxy random-xcor random-ycor
]
create-fishes 300
[
setxy random-xcor random-ycor
set x0 xcor
set y0 ycor
set shape "fish"
set size 2.5
set color white
]
ask turtles [
if shape = "star"
[
let turtleID min-one-of other turtles [distance myself] ; Create a variable that identifies nearest turtle to apex
ifelse [shape] of turtleID = "dot" ; Evaluate whether the nearest turtle is a small meso
[
ifelse distance turtleID < 0.5 ; check if prey is still close enough
[
; do this if within radius 0.5
set color green
]
[
; do this if not within radius 0.5
set color yellow
]
]
[
if [shape] of turtleID = "fish" ; Evaluate whether the nearest turtle is a fish
[
ifelse distance turtleID < 0.5
[
; do this if within radius 0.5
set color red
]
[
; otehrwise do this if not within radius 0.5
set color orange
]
]
]
]
]
end