Help needed to ID Hitchhiker.

[Edmund Koh]

Bros,

Need some help to ID this Hitchhiker that came along with my rock of mushrooms. It's the red "bulb" that is in the picture and it shrinks when touched. When persistently touched, it would shrink into a really small size and becomes as hard as the rock it is on. Once in awhile it would also "spit out" some black coloured "eraser dust" looking thing. It doesn't move and seems encrusted to the rock.

Have tried to google it but no luck yet.

[asg]

Looks like chili coral to me. Does it expand at night with white PE?

[Edmund Koh]

This is the biggest it will expend to. When closed its flushed to the rock. Not sure what u mean by white PE. Sorry >.< really bad with short forms.

[Edmund Koh]

Bro, managed to identify it le. It's a sea squirt.

[asg]

http://www.liveaquaria.com/product/prod_display.cfm?c=597+600+2980&pcatid=2980

Bro, does it looks like the pict?

[Edmund Koh]

Nope no where near.

It has an opening at the tip of the come shape.

[asg]

Sea squirt?

[Edmund Koh]

Here u go

http://depts.washington.edu/fhlk12/links/StudentProjects/Tun.biology.html