void Start()
 {
     riverFishCharacter = GetComponent <RiverFishCharacter>();
     goalGameObject     = new GameObject();
     initialPosition    = transform.position;
     GoalChange();
     goalChangeTime = Random.Range(0f, 5f);
     goalRelPos     = goalGameObject.transform.position - transform.position;
 }
 void Start()
 {
     riverFishCharacter = GetComponent <RiverFishCharacter>();
 }