Coelomates that develop with the blastopore becoming the mouth are protostomes. An example of a protostome would be the Caribbean reef squid.
the difference is that a duetrostome (second mouth) is the end and the protostome(first mouth) is the begining.
protosome
deuterostomes
Yes, annelids belong to the protostome group of animals. Protostomes are a group of animals whose blastopore develops into the mouth first during embryonic development. Annelids, such as earthworms and leeches, exhibit characteristics consistent with protostome development.
An example of a protostome is a snail. Protostomes are organisms in which the blastopore, the opening of the developing embryo, becomes the mouth of the adult organism.
protostome development
Protostomes. Development begins with spiral, determinate cleavage. Coelom formation then begins in the gastrula stage, the coelom forming from splits in the mesoderm. The mouth then develops from the first opening, the blastopore, and the anus develops secondarily.
Gastrulation
The Humboldt squid and the Giant Squid are two separate species
The squid is called a firefly squid.
but what the squid