This seagrass species is a kind of flowering plant that lives beneath the sea, providing an important habitat for many rare and wonderful species.

Seabass is a seafood favourite, appearing on menus throughout the UK. But it's in trouble in UK seas, with much of the seabass we eat imported from European fish farms.

Found in compost heaps and under stones in gardens, the flat-backed millipede is a common minibeast. It is an important recycler of nutrients, feeding on decaying matter.

Sand eels are a hugely important part of our marine ecosystem. In fact, the fledgling success of our breeding seabirds entirely depends on them.