What is this? Good or bad? Saw this at night.

[Chriskt]

Hey everyone,

I'm 6 months into my saltwater aquarium. I woke up in the middle of the night and saw these two. One looks like a slug and the other is a snail? Can you take a look and let me know if these are good or bad for my tank?

Possible slug or worm:
https://drive.google.com/open?id=0B30Uc0nnTTbUcW9Ma1pOTng2QW8

Possible snail:
https://drive.google.com/open?id=0B30Uc0nnTTbUcGtrQ3JPVkFOakk

Sincerely,
An amateur

 

[Shawn O]

My guess would be neutral.

 

[RWEngineer]

How can you tell?

 

[Ron Reefman]

It blends in with the background so well I really can't even see it!

 

[Sk8r]

1 is probably a nudibranch. They can be a problem for soft corals. 2 could be a stomatella snail (has a saddle instead of a full shell and is quite desirable.)

 

[Shawn O]

Sk8r, I don't see 1 or 2.

 

[Dkuhlmann]

I don't see the first ones as well

 

[Bent]

I see no pics at all.

 

[gone fishin]

Sk8r and her Modly powers again.:lol:

 

[Auston]

No pic

 

[Conor_K]

Sk8r and her Modly powers again.:lol:

Hahaha. This made me laugh. .

 

[Ron Reefman]

It blends in with the background so well I really can't even see it!

Yeah, this was a joke because I don't see any pics either!