Giant Nudibranchs

Mention is made of some strange, as yet unidentified, giant sea slugs "at the mouth of the Red Sea at Bab el-Mandeb" near Djibouti. First spotted in 1990, "to this day, it is uncertain whether the ‘Djibouti Giants’ are a giant form of the Red Sea Spanish Dancer Hexabranchus sanguineus or a species new to science." (News source.)