• Bagrichthys macracanthus, the black lancer, is the only species of Bagrichthys, a genus of catfishes, that is traded in the aquarium hobby?
• twirling is a key component of many artforms, hobbies, and sports where an object, such as a pen, baton or stick is spun or rotated to achieve the desired effect?
• Richard Polwhele's polemic poem The Unsex'd Females deplored the female pastime of amateur botany due to the impropriety of learning about the reproduction of plants?

Facts on topics related to Hobby

Coral reef

• Apo Reef in Sablayan, Mindoro is the world's second-largest contiguous coral reef system and the largest in the Philippines?
• Charles R. Stelck proved that ancient coral reefs had once existed in the Arctic and that oil could be found there?
• Pigeon Island National Park (pictured) contains some of the best remaining coral reefs of Sri Lanka?
• the Delaware Basin in Texas contains fossilised coral reefs from the Permian era?
• the Hawai`i Institute of Marine Biology is the only research center in the world built on a coral reef?
• the Monkey River feeds the second largest barrier-reef complex in the world?

Garden

• Hong Lim Green was Singapore's first public garden?
• a suikinkutsu is a type of Japanese garden ornament and a music device?
• the Brindavan Gardens in Karnataka is a Mughal style garden having a design similar to that of Shalimar Gardens in Kashmir?
• the Eastern Spinebill of Australian forests has adapted to urban gardens and can feed from Fuchsias as well as native banksias and grevilleas?
• the Australian native Dagger Hakea is an effective plant for sheltering small birds such as the Superb Fairy-wren, especially in the natural landscaping style of gardening?