| A setose lobster has distinct hairs on the swimmerets under its tails, indicating breeding condition. |
| Scutellum dark red-brown, largely apruinose except for two dull gold pruinose areas anteriorly, fine pale yellow setose. |
| Femora dark red-brown, metathoracic femora with yellow-brown proximal and distal ends, mixed dark red-brown and pale yellowish setose. |
| The antennae are setose, the legs slender, with cerci that are usually rather short. |
| Although the larvae of the fifth stage have somewhat natatory setose on their pleopods, they appear not to be completely functional. |
| With its finely setose appendages, G. tigrinus may be capable of suspension-feeding, as has been reported for other nontubicolous amphipods. |
