Purple sponge

[Tony Romano]

I removed a dead cap last night, on rock under the spot is a great looking purple sponge. Will it survive in direct light?

[JohnnathanB]

lighting is not an issue as sponges are non photosynthetic, as long as it recieves the same amounts of nutrients as it did in ts previous location its fine.

(i have white and yellow sponges growing in direct light)

[graveyardworm]

My experience is that although they dont use light many sponges recede from it. Unless its a variety that tolerates light it will likely disappear. Many sponges are nearly completely cryptic.

[Tony Romano]

I don't think they can compete with algae. I have noticed black, yellows and whites seem to do ok. We shall see with purple, I am doing ULN so maybe!

[Tony Romano]

There’ll be no one to save, with the world in a grave - is this from a song?

[graveyardworm]

There’ll be no one to save, with the world in a grave - is this from a song?

Eve of destruction.

[Tony Romano]

Black Sabbath 2d LP?

[graveyardworm]

Black Sabbath 2d LP?

Nope or maybe, I'm not familiar with the lyrics to the song you suggested off hand.

Eve of Destruction, Barry McGuire (http://s0.ilike.com/play#Barry+McGuire:Eve+Of+Destruction:32606:s7421382.11816269.16808.1.2.117%2Cstd_67bc661477584de493 f51a5bad8d6375)

[JohnnathanB]

nice

[Tony Romano]

Purple sponge seems to be deteriorating in direct light.

[saltysticks]

some sponges are photosynthetic, but I do not think yours is.

[vlim13]

I have a yellow sponge that has turned quite red on the side exposed to light. Another one that looked like an open clam, and is deep red, has receded to the point that it's pretty much gone. The other sponges seem to be doing just fine - just this one has withered away.

[LeslieH]

Some sponges & other organisms are negatively effected by UV light. That's one of the reasons why they're found under rocks, in caves, or the mobile ones come out only at night. Another is protection from predation.