any ideas?

[ecobalance]

This is a 75 gallon at my house that has been up for about 7 years now and nothing has been added since about a year now.Last night i walk by and there is this huge pure black slug looking thing crawling across the front glass.I took a couple (not so great pics.)so here it is.

 

[Tieg]

This is a 75 gallon at my house that has been up for about 7 years now and nothing has been added since about a year now.Last night i walk by and there is this huge pure black slug looking thing crawling across the front glass.I took a couple (not so great pics.)so here it is.

Looks like the mutate creature from the Black Lagoon to me. I have no idea but it always amazes me what will come out of the "Rockwork".

 

[Boomer]

It is a Black Scutus, a type of Limpet

http://www.seaslug.info/factsheet.cfm?base=scutus

 

[ecobalance]

Wow thanks

The only thing i've added lately was a coco worm.Weird how i never seen this thing before.

 

[morgan]

looks like a nudi if it is a type of limpit i think they get very big and if u touch them in the middle a hard shell or plate may appear

 

[tike]

Boomer is right. i use to have them a long time ago.