This bumpy shell lives up to its name and lives partly buried in the seabed along the west coast of Great Britain.

This gentle giant is the largest shark in UK seas, reaching up to 12m in length. There's no need to fear them though, they only eat plankton!

Look for wood avens along hedgerows and in woodlands. Its yellow flowers appear in spring and provide nectar for insects; later, they turn to red, hooked seedheads that can easily stick to a…

Look for Water avens in damp habitats, such as riversides, wet woodlands and wet meadows. It has nodding, purple-and-orange flowers that hang on delicate, purple stems.

Fel mae ei enw yn Saesneg, ‘Himalayan balsam’, yn awgrymu, mae ffromlys chwarennog yn dod o'r Himalayas ac fe'i cyflwynwyd yma yn 1839. Mae bellach yn chwyn ymledol ar lannau afonydd a…