Mae'r seren fôr fawr yma’n edrych yn union fel yr haul, gyda 10 i 12 braich yn ymledu allan fel pelydrau.

Bottlenose dolphins in British waters are the biggest of their kind – they need to be able to cope with our chilly waters! They are very sociable and will happily swim alongside boats, providing…

Risso’s dolphins are mysterious creatures usually only found in deep, offshore waters.

These large rocky shore fish look like they belong in deeper waters, but they are the find of the day for any rockpooler!

Mae’n hawdd gweld o ble mae’r slefren fôr cwmpawd wedi cael ei henw – mae ei marciau brown yn edrych yn union fel cwmpawd! Er ei bod yn edrych yn hardd – mae ei brath yn gas, felly cadwch eich…

Not to be confused with the ‘jewel anemone’ which resides in deeper waters, the gem anemone is just as wonderful a find on the rocky shore!

One of the only venomous fish to be found in British waters, the lesser weever fish is certainly one to watch out for!

Mae gan y fantell garpiog ymylon adenydd carpiog nodedig, sy'n helpu i'w chuddliwio - wrth orffwys, mae'n edrych yn union fel deilen farw! Mae'n ffafrio ymylon coetir, ond…

The grey partridge is an attractive bird that prefers the ground to pear trees! Found on farmland and grassland, it is under threat from loss of habitat.

The rare natterjack toad is found at just a few coastal locations, where it prefers shallow pools on sand dunes, heaths and marshes.

The White admiral is a striking black-and-white butterfly with a delicate flight that includes long glides. It prefers shady woodlands where it feeds on Bramble.

Mae mor hawdd methu’r gwyfyn bach clyfar yma. Mae’n feistr ar guddio’i hun, gan gyfuno’n berffaith gyda choed gan ei fod yn edrych yn union fel brigyn bedwen! Yn hedfan yn ystod y nos yn unig, mae…