2 White things

[vcnt]

What id these things, aswel as the white dots on the back, they look almost like mini barnacles

Also what is this spiky stuff

 

[Gumbies R Us]

The second picture is spionid worms, usually will show up as a tank matures, but will die off overtime (harmless)

 

[vcnt]

The second picture is spionid worms, usually will show up as a tank matures, but will die off overtime (harmless)

Should I do anything? if so what?

 

[Crabs McJones]

sponges and spirorbid worms. both harmless filter feeders

 

[Gumbies R Us]

Should I do anything? if so what?

I would just let them be, they don't harm anything

 

[vcnt]

sponges and spirorbid worms. both harmless filter feeders

Will the sponges overtake? what is the third pic?

 

[BristleWormHater]

Pic 1 and 3 sponges
Pic 2 are spirorbid worms, they are harmless filter-feeders, but you can scrape them off with a razor if you don't like them.

 

[vcnt]

Pic 1 and 3 sponges
Pic 2 are spirorbid worms, they are harmless filter-feeders, but you can scrape them off with a razor if you don't like them.

OKay thank you

 

[BristleWormHater]

Will the sponges overtake? what is the third pic?

Probably not, unless you explicitly feed them they usually die off.

 

[ISpeakForTheSeas]

Picture 1 is of a Lissoclinum sp., probably L. fragile - it's a colonial tunicate species. Colonial tunicates are filter-feeders, but some species are highly invasive, so I usually recommend restricting them to an isolated rock where you can easily control their spread. This is not a common hitchhiker species, so this is actually a pretty neat find - if you want to try and help it do well:

If you want to try and help the tunicates do well, offering some phytoplankton would probably be wise. Isochrysis and Rhodomonas or a blend containing at least one of these would be my first choice. For a more intensive diet that would likely show better results, see "Table 3" in the link below:

Coupling feeding activity, growth rates and molecular data shows dietetic needs of Ciona robusta (Ascidiacea, Phlebobranchia) in automatic culture plants

The sea squirt Ciona robusta is a model organism characterized by a transparent body, exhibiting peculiar physiologic and evolutionary characters. In vitro fertilization and breeding of sea squirts is possible, in order to preserve consistent genetic ...

www.ncbi.nlm.nih.gov

Picture 2 is, as mentioned, Spirorbid Worms - these are harmless filter-feeders (they're mini feather duster worms); they can sometimes boom in population and become unsightly to some people, but they can be scraped off relatively easily if wanted.

Picture 3 is of sponges - most sponges are harmless/beneficial; a few can be problematic:

Most sponges are completely harmless/beneficial, but some can be invasive and/or harmful to corals (thankfully, these are rare).

To tell if a sponge is chemically harmful: if a healthy, established coral starts closing up or looking to be in bad shape on the side closest to the sponge as the sponge grows closer to it, and nothing else has happened (lighting changes, parameter swings, pests, etc.) that could explain it, then the sponge is probably chemically harmful.

Chemically harmful sponges are very rare.

For invasive sponges: unless it shows signs of being chemically harmful or starts actively growing over and smothering a coral's flesh/polyps, it's harmless. These can grow over the skeletons of corals, around the base/stalks of corals, even up into the water column above corals (where they're over the coral but not growing on the flesh or polyps themselves), etc. without harming the coral at all - as long as the coral flesh and polyps can get food, light, and flow, the sponge is harmless.

Invasive sponges are moderately rare.

Invasive and chemically harmful sponges are incredibly rare.

 

[vcnt]

Picture 1 is of a Lissoclinum sp.,

I ve got it growing on like 3 different spots, i heard you can shot air from a syringe at it to kill/harm, is this true?

 

[ISpeakForTheSeas]

I ve got it growing on like 3 different spots, i heard you can shot air from a syringe at it to kill/harm, is this true?

Possibly, but I can't confirm that. I would expect it irritate the tunicates, but likely not kill them (I don't see how the air could easily get trapped in them like it could with sponges) - I would guess putting an airline hooked up to an air pump inside the colony would dry them out and kill them though.

That said, aside from just scraping these off, I'm honestly not sure what the best removal method is if you don't want them. The airline would be one thought, but the below would be my other, current thoughts on what to try (for context, the OP in the thread had an invasive tunicate species growing on their zoas):

I know these can be killed by drying out or soaking in freshwater, but I doubt the zoas would appreciate those methods. You could try manual removal or common sponge removal methods like injection with boiling water or something, but that seems risky with the zoas.

Honestly, I don't know if it would work, but I'd personally probably try "feeding" it DIY Coral Snow (basically powdered chalk) and seeing how it reacts - if the little holes close up, then you might be able to just dose enough to keep them shut until they starve out, but definitely no guarantees there.

Yeah, I'd try the coral snow, and if that doesn't work then you may be able to try a few different experimental removal methods like attempting to dehydrate them from the inside out or something similar.