Izuzuki Diver, Satoshi Yamamoto, Japan
Info
Gobies of the genus Amblyeleotris cannot build shelters for themselves, they use the abilities of a goby to do so.
The crayfish digs a retreat for itself and the goby, both then live together in the living tube in the form of a symbiosis:
The gobies use the burrows as shelter and nesting sites, while they serve as a tactical alarm signal for the firecracker to warn of potential predators, causing the firecracker to immediately disappear into the burrow.
Amblyeleotris japonica feeds on benthic organisms near the cave entrances, the gobies drop their feces into the caves for the firecracker, which the crustacean feeds on (see the ResearchGate report in the related links).
Scientists drew these conclusions because the gobies never defecate outside the burrows despite frequent foraging and were rarely observed feeding outside the burrows.
The thesis was substantiated in a laboratory experiment carried out over a period of 2 weeks with the host crayfish Alpheus bellulus and its partner goby Amblyeleotris japonica.
When a firecracker and a goby were kept together in a tank and only the goby was provided with food, the body weight of the firecracker remained stable.
When a firecracker was kept alone in one tank and fed with the feces of a goby from another tank, the body weight of the firecracker decreased slightly.
Synonym: Amblyeleotris japonicus Takagi, 1957
Jumping guard
A jumping guard prevents (nocturnal) fish from jumping out.
Wrasses, blennies, hawkfishs and gobies jump out of an unprotected tank in fright if their night rest is disturbed, unfortunately these jumpers are found dried up in the morning on carpets, glass edges or later behind the tank.
https://www.korallenriff.de/en/article/1925_5_Jump_Protection_Solutions_for_Fish_in_the_Aquarium__5_Net_Covers.html
A small night light also helps, as it provides the fish with a means of orientation in the dark!
The crayfish digs a retreat for itself and the goby, both then live together in the living tube in the form of a symbiosis:
The gobies use the burrows as shelter and nesting sites, while they serve as a tactical alarm signal for the firecracker to warn of potential predators, causing the firecracker to immediately disappear into the burrow.
Amblyeleotris japonica feeds on benthic organisms near the cave entrances, the gobies drop their feces into the caves for the firecracker, which the crustacean feeds on (see the ResearchGate report in the related links).
Scientists drew these conclusions because the gobies never defecate outside the burrows despite frequent foraging and were rarely observed feeding outside the burrows.
The thesis was substantiated in a laboratory experiment carried out over a period of 2 weeks with the host crayfish Alpheus bellulus and its partner goby Amblyeleotris japonica.
When a firecracker and a goby were kept together in a tank and only the goby was provided with food, the body weight of the firecracker remained stable.
When a firecracker was kept alone in one tank and fed with the feces of a goby from another tank, the body weight of the firecracker decreased slightly.
Synonym: Amblyeleotris japonicus Takagi, 1957
Jumping guard
A jumping guard prevents (nocturnal) fish from jumping out.
Wrasses, blennies, hawkfishs and gobies jump out of an unprotected tank in fright if their night rest is disturbed, unfortunately these jumpers are found dried up in the morning on carpets, glass edges or later behind the tank.
https://www.korallenriff.de/en/article/1925_5_Jump_Protection_Solutions_for_Fish_in_the_Aquarium__5_Net_Covers.html
A small night light also helps, as it provides the fish with a means of orientation in the dark!
