19. Thysanoteuthis Rhombus
The Thysanoteuthis Rhombus happens to be one of the most interesting sea creatures in the world today. Often referred to by people as the Diamond Squid due to its shape, this also ranks among the most horrifying sea monsters too. They can become very large compared to other squid species. However, their true claim to fame may just be their eggs.
Whenever a Diamond Squid is pregnant and ends up laying out eggs, they do so in something known as an “egg mass” that also has very visible pink egg strands around the overall egg mass itself. These can make the egg mass look somewhat like a big headless sea snake and thus make it horrifying to see randomly in the sea.