Georgette Douwma / Colonial anemones (Amphianthus nitidus) with Green urn sea squirts (Didemnum molle) (Atriolum robustum). Lembeh Strait, North Sulawesi, Indonesia.

Andres M. Dominguez / Dove's-foot crane's-bill leaf (Geranium molle) and algae in ice with air bubbles, Sierra de Grazalema Natural Park, southern Spain, February.

Juergen Freund / Green urn sea squirt / tunicate (Didemnum molle) internal detail. Misool, Raja Ampat, West Papua, Indonesia.

Alex Mustard / Sleepy sponge crab (Dromia dormia) climbing over a rock, carrying its sea squirt (Didemnum molle) disguise, with brittlestar. Anilao, Batangas marine protected area, Luzon, Philippines. Verde Island P...

David Fleetham / Tunicate (Didemnum molle), Bali, Tulumben, Indonesia.

Paul Harcourt Davies / Roadside flowers near Castelluccio di Norcia (Umbria) including Venus looking glass (Legousia speculum-veneris). Vetch (Vicia viullosa), Cranesbill (Geranium molle), Field pansy (Viola arvensis) Umbri...

Paul Harcourt Davies / Roadside flowers near Castelluccio di Norcia (Umbria) including Venus looking glass (Legousia speculum-veneris). Vetch (Vicia viullosa), Cranesbill (Geranium molle), field pansy (Viola arvensis) Umbri...

Andres M. Dominguez / Dove's-foot crane's-bill leaf (Geranium molle) and algae in ice with air bubbles, Sierra de Grazalema Natural Park, southern Spain, February.

Georgette Douwma / Colonial anemone (Amphianthus nitidus) and Green urn sea squirt (Didemnum molle) on a gorgonian branch. Lembeh Strait, Sulawesi, Indonesia.

Georgette Douwma / Large sea squirt (Didemnum molle) growing on a sea whip. Mabul, Malaysia. Indo-Pacific.

Aflo / Goby (Gobidae) on tunicate (Didemnum molle) Ishigaki-Jima Island, Japan. July.

Solvin Zankl / Green urn sea squirt / tunicate (Didemnum molle) detail of inner mouth, Raja Ampat, West Papua, Indonesia, Pacific Ocean.

Dr. Axel Gebauer / Sikkim knotweed (Polygonum molle) newly discovered food plant of Red pandas, Pangolakha Wildlife Sanctuary, 3,500 m, India

Simon Colmer / Velvet combretum (Combretum molle) leaves, a medicinal pla: used for treating leprosy, stomach ailmets and as a cough expectorant

Simon Colmer / Dove's-foot Crane's-bill (Geranium molle) in flower. Sussex, UK, May.

Juergen Freund / Green urn sea squirt / tunicate (Didemnum molle). Misool, Raja Ampat, West Papua, Indonesia.

Juergen Freund / Green urn sea squirt / tunicate (Didemnum molle) internal detail. Misool, Raja Ampat, West Papua, Indonesia.

Juergen Freund / Green urn sea squirt / tunicate (Didemnum molle), close-up of the syphon. Misool, Raja Ampat, West Papua, Indonesia.

Juergen Freund / Green urn sea squirt / tunicate (Didemnum molle). Misool, Raja Ampat, West Papua, Indonesia.

Juergen Freund / Green urn sea squirt / tunicate (Didemnum molle). Misool, Raja Ampat, West Papua, Indonesia

Tim Laman / Tunicates (Didemnum molle) Bali, Indonesia.

Simon Colmer / Dove's-foot crane's-bill (Geranium molle) in flower, Sussex, England, UK

Sue Daly / Seasquirt / Tunicate (Didemnum molle) Lembeh Straits, Sulawesi, Indonesia

Sue Daly / Seasquirt / Tunicate (Didemnum molle) Lembeh Straits, Sulawesi, Indonesia

Chris Newbert / Sea Squirt (Didemnum molle) group and Gorgonian Wrapper (Nemanthus annamensis) sea anemone, Indonesia

Jeff Rotman / Urn-Synascidians tunicates (Didemnum molle) Sipadan Island, Borneo, South China Sea.

Chris Newbert / Sea Squirt (Didemnum molle) and Sea Squirt (Didemnum nekozita), Palau

Roberto Rinaldi / Colony of Didemnum molle (Didemnidae), on hard coral, Malaysia.

Alex Mustard / Flatworm (Cycloporus sp.) resting inside a Sea squirt (Didemnum molle) on a coral reef, Raja Ampat, West Papua, Pacific Ocean.

Sergio Hanquet / Green barrel sea squirts (Didemnum molle) on coral reef, Ari Atoll, Maldives, Indian Ocean.

Nick Upton / Dove's-foot crane's-bill (Geranium molle) flowering on coastal sand dunes in spring, Merthyr Mawr Warren National Nature Reserve, Glamorgan, Wales, UK. April.

Alex Mustard / Tiny snapping shrimp (Synalpheus sp.) looks out from within sea squirt (Didemnum molle) at night on a coral reef. Piaynemo Island, Raja Ampat, West Papua, Indonesia. Dampier Strait, Tropical West Paci...

Nick Upton / Dove's-foot cranesbill (Geranium molle) flowering in a meadow, Suffolk, UK, May.

Paul Harcourt Davies / Dove's-foot crane's-bill (Geranium molle) Podere Montecucco, Umbria, Italy, May.

Nigel Cattlin / Dovesfoot or dove's-foot cranesbill (Geranium molle) young annual weeds in stubble post-harvest, Berkshire, England, UK, September

Georgette Douwma / Dark red spined brittlestar (Ophiothrix purpurea) with Green urn sea squirts(Didemnum molle). Tulamben, Bali, Indonesia.

Georgette Douwma / Green urn sea squirts (Didemnum molle) on a gorgonian. West Papua, Indonesia.