public Boid InstantiateBoid(Vector3 position, bool isFish = false)
{
Boid boid = Instantiate(boidPrefab, position, Quaternion.identity, boidsParent).GetComponent <Boid>();
Boids.Add(boid);
boid.Index = Boids.IndexOf(boid);
boid.IsFish = isFish;
return(boid);
}