Yes, my long finned Black Widows swim around and around the tank, all day and every day, thinking about the meaning of life. Plus they are just sooo spiritual.
It always surprises me how ignorant of the good book you guys are;
Eccliastes 3
18 I said in mine heart concerning the estate of the sons of men, that God might manifest them, and that they might see that they themselves are beasts.
19 For that which befalleth the sons of men befalleth beasts; even one thing befalleth them: as the one dieth, so dieth the other; yea, they have all one breath; so that a man hath no preeminence above a beast: for all is vanity.
20 All go unto one place; all are of the dust, and all turn to dust again.
Indeed as Koheleth (the author) repeatedly says throughout the text, "all is vanity". I think you underestimate your fish and owe them an apology.