7 Different Mystery Objects

[Spejz]

Hello!

3 weeks ago I bought my first saltwater aquarium, an already up and running Reefer 170.
I have looked through lots of "Critter ID" threads here to increases my knowledge prior to buying a saltwater tank, but it seems like that was not enough because I have found 7 Mystery Objects (mystery to me at least) in my new aquarium I would like to know more about.

First of all I have 2 normal looking mussels in the tank, maybe 4 cm in length. But then I have this huge mussel, or at least I think its a mussel, that is 15 cm in length. I haven't seen anything similar in pictures or video of other peoples tanks. According to the previous owner, it has grown 10 cm in half a year. Anyone got more information on this?

Mystery Object 1: Huge mussel, 15 cm

Mystery Object 2: White fingers. Soft, got some holes and seems to be hollow, 5 cm from base to top

Mystery Object 3: Beige ball, maybe some kind of sponge, found 7 around the tank, 0,5 - 1 cm, might have a 7 cm blob of them

Mystery Object 4: Looks like the texture of black velvet, 5 cm front to back

Mystery Object 5: White translucent sponge, seems like it also curls over the rocks in 2 mm thick strings, up to 10 cm long I have seen

Mystery Object 6: Looks like a snail, shell is more bending over then spiraling, 2 cm

Mystery Object 7: Small 8 mm snail, have 5+ of them, seem to be nocturnal because they all come out on the glass when light is off​

I know all the pictures are not the best but if you have any more information on some of these Mystery Objects please let me know.
Thanks

 

[CMMorgan]

I cannot give you genus specifics but I think you are on the right track. Mussel, sponges, snail .... baby snails.
It's a cool tank you have there! Welcome to the group!! Your profile picture is too cute for words.

 

[Spejz]

I cannot give you genus specifics but I think you are on the right track. Mussel, sponges, snail .... baby snails.
It's a cool tank you have there! Welcome to the group!! Your profile picture is too cute for words.

Heh, thank you! Hope you will get a new tank arriving soon!

 

[king aiptasia]

1 species of pinnidae mussel, nice find
2345 all seem to be sorts of sponges
6 nerite
7 not 100% sure possibly a collonista

 

[Spejz]

1 species of pinnidae mussel, nice find
2345 all seem to be sorts of sponges
6 nerite
7 not 100% sure possibly a collonista

Thank you very much for your answer!

The pinnidae mussel is definitely the best resemblance so far, some small differences in shape, so I will try to look in to it further.
For the snails you were spot on for both of them.

Thanks again!

 

[Peter Houde]

#3 looks more like a colonial tunicate than a sponge to me