The Île Ronde is a French islet 400 metres to the south west of Pointe de l’Armorique, in the roadstead of Brest, within the territory of the commune of Plougastel-Daoulas. Its highest point is 24 m. Facing Île Ronde, on the pointe de l’Armorique, is the fort de la pointe de l’Armorique, built in 1775 for the defense of Brest. In the sea, 600 metres to the east of Île Ronde, are two dolphins, concrete cubes built by the German occupiers during the Second World War at a place where the water is 16 m deep, they were intended to host the German battleship Bismarck, but she was sunk in May 1941 before she could reach Brest and never used them. It seems; the proximity of the channel separating Île Ronde from the pointe de l’Armorique gives rise to severe sea currents, making docking manoeuvres at this point difficult. Today unused, these concrete cubes have become inaccessible for humans and thus have become a haven for flora and fauna, including nests for common terns

Trulla is a fungal genus in the family Steccherinaceae containing six species of polypores. It was circumscribed by mycologists Otto Miettinen and Leif Ryvarden in 2016, as a continuation of prior work that outlined a revised framework for the Steccherinaceae based on molecular phylogenetics, its closest relative in the Steccherinaceae is the genus Nigroporus, from which it differs in its light-coloured fruit bodies and monomitic context. The generic name Trulla, from the Latin word for "ladle", alludes to the spatulate shape of the fruit bodies. Microscopic characteristics of the genus include spores that are curved and cylindrical, cyanophilic skeletal hyphae and thick-walled, wide generative hyphae in the context. Trulla contains six species that were transferred from various other polypore genera, including Antrodiella, Leptoporus and Tyromyces. Additional phylogenetic analysis may reveal more species hidden in the T. duracina species complex. Trulla crustulina Miettinen Trulla dentipora Miettinen & Ryvarden Trulla duracina Miettinen Trulla meridae Miettinen & Ryvarden Trulla ochrotinctella Miettinen Trulla polyporoides Miettinen & Ryvarden Most species of Trulla are found in tropical areas, although in some cases the distribution extends to south temperate regions in North America and Asia.

Like all members of the Steccherinaceae, Trulla are wood-decay fungi that cause a white rot in dead wood