Help me, something is taking my fish!

shogun1964 · Sep 5, 2017

I had a 5" blennie come up missing, now this morning I wake up and I'm losing a clownfish. They didn't jump out of the tank and there body isn't in the tank either. If they decomposed in the tank my nitrates would have went up, but both times there reading 0.

beardown · Sep 5, 2017

Bobbit worm?

shogun1964 · Sep 5, 2017

Both of them were active swimmers, how would he catch a swimming fish?

Mike N · Sep 5, 2017

shogun1964 said:
Both of them were active swimmers, how would he catch a swimming fish?

Bobbits are expert trappers

What else is in the tank?

Flippers4pups · Sep 5, 2017

Any signs of disease/parasites?

shogun1964 · Sep 5, 2017

I just saw these videos on YouTube, there lighting fast!

shogun1964 · Sep 5, 2017

No, healthy as can be.

Flippers4pups · Sep 5, 2017

Crabs? Hermits, emerald?

shogun1964 · Sep 5, 2017

I have 2 emerald crabs, but not when I had the blennie

S-t-r-e-t-c-h · Sep 5, 2017

shogun1964 said:
I have 2 emerald crabs, but not when I had the blennie

Wait, what period of time are we talking about? When did the blenny die and when did the clown die?

Also, what size tank, what else is in the tank, what are your tank parameters like?

shogun1964 · Sep 5, 2017

Not die, completely disappear

Flippers4pups · Sep 5, 2017

What size tank? What else is in there?

shogun1964 · Sep 5, 2017

60 gallon tank with 1 Oscar, 4 cardinal fish and a coral beauty

Flippers4pups · Sep 5, 2017

Oscar?

shogun1964 · Sep 5, 2017

Sorry, clown fish

MnFish1 · Sep 5, 2017

Seems that if something died suddenly it would take a while to see any difference in nitrate (if at all). (depending on the size of the tank and the size of the fish) . Ammonia/Nitrite perhaps would spike and be visible somewhat more quickly but if the biological filter is efficient you might not see any change in nitrate (or the others) at all. In other words, I don't think you can tell based on nitrate levels whether a fish died in or outside the tank (IMHO)