sand tiger: shallow-water shark with sharp jagged teeth found on both sides of Atlantic; sometimes dangerous to swimmers
vertebrate: animals having a bony or cartilaginous skeleton with a segmented spinal column and a large brain enclosed in a skull or cranium
clitocybe subconnexa: an edible white agaric that fruits in dense clusters; the gills are narrow and crowded and the stalk is fleshy and unpolished