wierd thing in my tank

[hollywood11892]

so i was looking in my tank and i noticed there was this fish looking thing it looked like fish larva but the thing is i dont have any fish in my tank as its fallow with inverts only in the tank and coral is was under rocks with what looked like some copepods any idea what it could be?

 

[mysticeel]

need pics please ^^

 

[hollywood11892]

i can try but idk if i can get it due to its size