Glassfish follow one nearby neighbour at a time when the school turns
When a glassfish school turns, each fish copies one nearby neighbour rather than averaging the direction of every fish around it. The brief matching window reported by the UC San Diego team describes coordinated turns as a sequence of one-neighbour interactions. The finding comes from one small species under laboratory conditions, so its reach to larger, mixed schools in the wild remains open.
Science··Morning
The school turns through one-neighbour steps
Phys.org and UC San Diego Today describe coordinated turns in glassfish schools through a one-neighbour copying rule. An individual selects one nearby neighbour at a time and copies that neighbour's direction instead of following the average direction of the whole group. The school's coordinated turn matches a movement pattern in which these pairwise interactions occur in succession. The rule reported by the two outlets describes group behaviour as repeated local matches between neighbours rather than a central decision.[1], [2]
A turn opens a brief response window
The finding also narrows the timing of the copying response. In the brief timing window immediately after a nearby neighbour turns, a glassfish copies that direction and synchronises. The report describes schooling as quick local responses observed at particular moments rather than a continuous, diffuse pull from the group. This timing specifies which neighbour interaction occurs around a coordinated turn and adds an observable behavioural pattern to the one-neighbour copying rule.[1]
The rule's reach in the wild remains open
The findings come from one small glassfish species under laboratory conditions. Both reports say the one-neighbour copying rule matches schooling in this species well, but schools in the wild can be much larger and may contain several species. The result therefore cannot be extended directly to every fish school. The study's concrete scope is limited to describing the local interaction observed around coordinated turns in one species, while the rule's validity in more complex natural groups remains open.[1], [2]
