private void OnTriggerEnter2D(Collider2D other)
    {
        if (other.tag == "Fish")
        {
            rigidbody.bodyType = RigidbodyType2D.Static;

            transform.SetParent(other.transform, false);

            Rigidbody2D fishRB = other.gameObject.GetComponent <Rigidbody2D>();
            fishRB.gravityScale = 1;

            FishLife fishLife = other.GetComponent <FishLife>();
            fishLife.Die();

            Mission.Instance.OnFishHunted();

            Destroy(gameObject);
        }
    }
 private void Awake()
 {
     fishLife = GetComponent <FishLife>();
     speed    = Random.Range(1, 5);
 }