Reproductive and growth parameter estimation utilizing length-Stratified age samples of sandbird octopus () near Phetchaburi Province, Thailand.

This study aimed to analyze the growth parameters and age-length relationships of the sandbird octopus () along the coast of Chao Samran Beach, Phetchaburi Province, Thailand. This included determining reproductive stages, the gonadosomatic index, and size at first maturity. A total of 1436 specimens comprising 782 males and 654 females were collected using octopus traps during January to December 2021.

Analysis of neurotransmitter distribution in brain development of benthic and pelagic octopod cephalopods.

The database on neurotransmitter distribution during central nervous system development of cephalopod mollusks is still scarce. We describe the ontogeny of serotonergic (5-HT-ir) and FMRFamide-like immunoreactive (Fa-lir) neurons in the central nervous system of the benthic Octopus vulgaris and Fa-lir distribution in the pelagic Argonauta hians. Comparing our data to previous studies, we aim at revealing shared immunochemical domains among coleoid cephalopods, i.