Mae'r rhywogaeth yma o forwellt yn fath o blanhigyn blodeuol sy'n byw o dan y môr, gan ddarparu cynefin pwysig i lawer o rywogaethau prin a rhyfeddol.

These pretty black and red moths are often confused for butterflies! Their black and yellow caterpillars are a common sight on ragwort plants. The caterpillar’s bright colours warn predators not…

The dark green fritillary is actually an orange butterfly with black spots. It gets its name from the dark green hue to the undersides of its hindwings. A strong flier, it can be seen on open,…

White dead-nettle does not sting. It displays dense clusters of white flowers in whorls around its stem, and can be found on disturbed ground, such as roadside verges.

The long mane of tentacles that stream out from the lion's mane jellyfish is stunning… literally! Look but don't touch when it comes to these jellyfish - they give a powerful sting.

As its name suggests, the Dwarf thistle is a low-growing plant that is almost stemless - its purple, thistle-like flower heads growing out of a rosette of spiny leaves.

Red dead-nettle does not sting. It displays dense clusters of pinky-red flowers in whorls around its stem, and can be found on disturbed ground, such as roadside verges.

The scorpionfly, as its name suggests, has a curved 'tail' that looks like a sting. It is, in fact, the males' claspers for mating. It is yellow and black, with a long 'beak…

Wedi'i gyfyngu'n bennaf i ogledd y DU, mae’r bele prin yn nosol ac yn anodd iawn ei weld. Fodd bynnag, gellir ei hudo i ymweld â bwrdd adar llawn pysgnau.