to squirt out ink O_O
for self defence and for projection through the water
The purpose of the radula of a squid or a snail is similar to that of a tooth. It is part of the equivalent of the tongue, and abrades hard bits from their prey.
A squids arms are normally used to capture prey and eat it. They are also used to move around the open water.
A siphon is found in octopus, squid, and in some snails and clams. The function is movement, feeding, respiration, and reproduction. In bi-valves, the siphons are paired. In cephalopods, there is a single siphon or funnel which is known as a hyponome.
The banded piglet squid is a small squid, with the piglet part of its name referring to its appearance. It appears to have a smiley face, caused by a certain alignment of skin pigments on its face. This squid looks very round and plump. It has hairlike tentacles on top of it. A syphon extends from the banded piglet squid, resembling a nose. The squid overall is about the size of an avocado. It has eight arms in addition to the tentacles. The banded piglet squid has a tendency to fill up with water. This also indicates why it is labelled a "piglet squid."
to help the squid stay up straight
to help the squid stay up straight
The pen is a feather-shaped internal structure that supports the squid's mantle and serves as a site for muscle attachment. It is made of a chitin-like substance. It is the remnant of the squid's shell, so it is a vestigial structure.
The pen of a squid is made out of pure calcium nitrate
nothing
A backbone.
The function squid testis is to produce sperm during reproduction.
A squid's tentacles are homologous to the snail's foot.
the pen
The pen
Almost all of the organs in a body have a function. A squid's liver helps in absorbing the food consumed by the squid.
a squid with a leaking pen